Defendant-appellant Luis Manuel Rodriguez-Lara (“Rodriguez”), an alien convicted of reentry after deportation, appeals the district court’s denial of his motion to appoint an expert to assist him in pursuing his equal protection and fair cross-section challenges to the composition of the jury pool in the Fresno Division of the Eastern District of California. Rodriguez also claims that the district court erred in its application of the U.S. Sentencing Guidelines and that the court violated his Sixth Amendment rights by enhancing his sentence in violation of Apprendi v. New Jersey and its progeny.
Given the extent of the fair cross-section showing Rodriguez was able to develop even without the help of an expert, we hold that under the circumstances reasonably competent counsel would have required the services of an expert for a paying client, and the lack of an expert prejudiced Rodriguez. The district court therefore abused its discretion in denying Rodriguez’s motion for the appointment of an expert. Although Rodriguez’s Sixth Amendments rights were not violated by the judge’s use of a prior conviction to enhance Rodriguez’s sentence, the district court committed plain error in applying the acceptance-of-responsibility reduction under the Sentencing Guidelines. We therefore vacate Rodriguez’s sentence and remand for resentencing and the appointment of an expert.
I. BACKGROUND
Under the Jury Selection and Service Act of 1968 (JSSA), 28 U.S.C. § 1861 et *937 seq., each federal judicial district must devise a plan for random selection of grand and petit jurors. This plan must be designed to ensure that litigants have grand and petit juries selected from a fair cross-section of the community in the applicable district or division of the district, and that no prospective jurors are subject to discrimination on any of several enumerated grounds. Id. §§ 1861-63. The statute contemplates that each district or division will use voter registration lists or the lists of actual voters of the political subdivisions within that district or division, but the statute also requires that jury selection plans “prescribe some other source or sources of names in addition to voter lists where necessary to foster the policy and protect the rights” of fair cross-section and anti-discrimination. Id. § 1863(b)(2).
The jury plan for the Eastern District of California provides that names of prospective jurors for the master jury wheel are to be drawn randomly from voter registration records for all counties within the relevant division of the district. Amended Plan for the Random Selection of Grand and Petit Jurors, General Order No. 374 (E.D.Cal. Mar. 22, 2000), at 3 (hereinafter “Amended Plan”). 1 The Fresno Division consists of Merced, Mariposa, Madera, Fresno, Inyo, Kings, Tulare, Kern, Calav-eras, Stanislaus, and Tuolumne Counties. Id. at 1. Names from the master jury wheel are drawn randomly as necessary to fill the qualified jury wheel (which consists of the names of individuals eligible for jury service and not exempt or excused); names from the qualified wheel are drawn randomly as necessary to select the individuals to be summoned for service on grand and petit juries. Id. at 8, 12. The qualifications for service are: United States citizenship; eighteen years of age; residence within the judicial district for one year; ability to read, write and understand English; ability to speak English; mental and physical capability to render satisfactory service; and no charge pending or conviction for a crime punishable by imprisonment for more than one year (absent restoration of civil rights). Id. at 10; 28 U.S.C. § 1865(b). Members of the armed forces in active service, members of police and fire departments, and public officers actively engaged in the performance of their official duties are exempt from service. Amended Plan at 11; 28 U.S.C. § 1863(b)(6). Individuals who are over seventy years of age, who have served as a federal grand or petit juror within the preceding two years, who serve as volunteer safety personnel, or for whom service would constitute an “undue hardship or extreme inconvenience” (for example, because of distance from the court or family emergency), may be excused from service. Amended Plan at 10-11.
In March 2003, Rodriguez was charged with being a deported alien found in the United States in violation of 8 U.S.C. § 1326. After successfully moving to represent himself, Rodriguez moved to dismiss the indictment, claiming that Hispanics were underrepresented in the jury wheel of the Fresno Division of the Eastern District of California, in violation of the fair cross-section requirement of the Sixth Amendment and of the equal protection guarantee of the Fifth Amendment. 2 *938 Relatedly, Rodriguez moved the court to provide him with jury statistics compiled by the court on forms designated “JS-12” (commonly known simply as “JS-12s”), and to appoint a demographic expert to assist him in substantiating his claims concerning the systematic underrepresentation of Hispanics in the jury pool.
The court denied these motions without prejudice, and Rodriguez renewed them, this time attaching supporting exhibits including (in relevant part) a 1992 declaration prepared for another case by an expert involved in several jury under-representation cases; the 1992 jury selection plan for the Eastern District of California; several JS-12s from the early 1990s; and 2000 census population data for the Fresno Division. The district court expressed doubt about the viability of Rodriguez’s claims but nonetheless ordered that Rodriguez be provided with a more recent JS-12.
Three days later, Rodriguez again renewed his motion to dismiss, now including the 2003 JS-12 statistics (provided by the court) reflecting demographics both for the group of individuals who returned juror questionnaires after being drawn from the master jury wheel, and for the group of individuals placed into the qualified jury wheel. Using this data, Rodriguez alleged a substantial disparity between the proportion of Hispanics in the subset of the population old enough to serve on federal juries (the “age-eligible” population) and the proportion of Hispanics in the qualified jury wheel. 3 Incorporating some of the arguments from the expert declaration he had attached to his second motion, Rodriguez asserted that the reason for the disparity was the Fresno Division’s use of voter lists as the sole source of names for the master jury wheel.
The day before trial, the court denied Rodriguez’s motions for the final time. In the view of the district court, Rodriguez was required to show a disparity between Hispanic representation in the qualified jury wheel and Hispanic representation in the subset of the population meeting all the federal juror-eligibility requirements (the “jury-eligible population”), not merely the general or age-eligible population, and the court characterized the government’s “supplemental voter information exhibit” as showing that for a portion of the Fresno Division, the jury-eligible population was approximately 17% Hispanic even though the total population was approximately 30% Hispanic. 4 The court noted that challenges to jury pool composition in the Eastern District of California had been rejected by the Ninth Circuit in 1996 and *939 by the Eastern District in 2003. 5 According to the court, the “best way” to determine if Rodriguez’s fair cross-section and equal protection rights were being violated “is to see who shows up tomorrow in the jury panel. And we will get a very good look. And if you don’t believe that there is a fair representation there, you can object and if it isn’t a representative panel, we don’t have to proceed to trial.” The court further observed that “in the last 15 to 20 cases, we get very, very strong Hispanic representation.” Not “see[ing] anything more that has been submitted than when we started this process,” and because of “the insufficiency of the factual showing which didn’t require an expert,” the court denied Rodriguez’s motions to dismiss and to have an expert appointed. 6
Rodriguez was convicted after a one-day trial.
At sentencing, the court applied a 16-level enhancement because Rodriguez had been previously deported following a conviction for a drug trafficking offense — a state felony conviction for transport of methamphetamine — for which he had received a sentence greater than 13 months. See U.S. Sentencing Guidelines Manual § 2L1.2(b)(l)(A)(I) (2002). After Rodriguez expressed deep regret for returning to the United States, the court gave a two-level reduction for acceptance of responsibility under U.S.S.G. § 3El.l(a), but declined to give a third level because the case went to trial and therefore the acceptance of responsibility was not timely (though the judge denied that he was penalizing Rodriguez for going to trial). Rodriguez did not object to the judge’s failure to give a three-level reduction. Applying the resulting sentencing range, the court sentenced Rodriguez to 77 months imprisonment, along with a special assessment of $100 (waived) and three years of supervised release.
Rodriguez timely appealed, and we have jurisdiction under 28 U.S.C. § 1291.
II. ANALYSIS
A. Jury Composition Challenges/Failure to Appoint an Expert
A district court’s denial of a request for public funds to hire an expert is reviewed for abuse of discretion.
United States v. Nelson,
Federal law provides that a district judge shall authorize the provision of expert services to a defendant financially unable to obtain them where such services are necessary for adequate representation.
*940
18 U.S.C. § 3006A(e)(l). It is an abuse of discretion to deny a request for an expert under this provision where (1) “reasonably competent counsel would have required the assistance of the requested expert for a paying client,” and (2) the defendant “was prejudiced by the lack of expert assistance.”
Nelson,
Rodriguez’s two challenges to the representativeness of the Fresno Division jury pool are related but distinct. In
Castaneda v. Partida,
[1] The first step is to establish that the group is one that is a recognizable, distinct class, singled out for different treatment under the laws, as written or as applied. [2] Next, the degree of underrepresentation must be proved, by comparing the proportion of the group in the total population to the proportion called to serve as ... jurors, over a significant period of time.... [3] Finally ... a selection procedure that is susceptible of abuse or is not racially neutral supports the presumption of discrimination raised by the statistical showing.
Id.
at 494,
To establish a prima facie case for a violation of the Sixth Amendment’s fair cross-section requirement, under
Duren v. Missouri,
(1) that the group alleged to be excluded is a “distinctive” group in the community; (2) that the representation of this group in venires from which juries are selected is not fair and reasonable in relation to the number of such persons in the community; and (3) that this un-derrepresentation is due to systematic exclusion of the group in the jury-selection process.
Id.
at 364,
The selection of a grand or petit jury in violation of either the equal protection or the fair cross-section guarantee is structural error that entitles a defendant to relief without a demonstration of prejudice.
See Vasquez v. Hillery,
474 U.S.
*941
254, 263-64,
1. Fair Cross-Section
We begin with the Sixth Amendment claim. Rodriguez’s claim clearly satisfies the first prong of
Duren.
Hispanics have long been recognized as a “distinctive” group in the community.
See United States v. Sanchez-Lopez,
The second prong of the
Duren
test requires the defendant to show that the distinctive group is underrepresented in jury venires “in relation to the number of such persons in the community.”
Duren,
The weight of Supreme Court and circuit authority teaches that, for purposes of the prima facie case, the proportion of the distinctive group in the jury pool is to be compared with the proportion of the group in the whole community. In
Duren
itself, the Supreme Court required the defendant to show “that the representation of this group in venires from which juries are selected is not fair and reasonable in relation to the number of such persons
in the community.” Id.
(emphasis added). The Court then elaborated that “the fair-cross-section requirement involves a comparison of the makeup of jury venires or other sources from which jurors are drawn with the makeup of the
community,
not of voter registration lists.”
Id.
at 365 n. 23,
Other Supreme Court authority reflects a similarly permissive view of the requirements of a prima facie showing of underrepresentation. In
Castaneda,
for example, the Supreme Court allowed the defendant to use total population figures to establish a prima facie case in the related context of an equal protection challenge to jury composition.
Following the Supreme Court’s lead, our circuit’s fair cross-section cases treat total population figures as an appropriate basis for comparison for the purposes of a prima facie case under
Duren. See, e.g., United States v. Suttiswad,
Our case law reflects one corollary to this rule: where the record contains population data broken down by age, the representativeness of the jury pool is to be compared to this refined set of data for the purpose of the defendant’s prima facie case under
Duren. See United States v. Esquivel,
Two of our cases appear to be in conflict with the Supreme Court and with the
Sanchez-Lopez
line of cases.
See United States v. Artero,
Sanchez-Lopez
is the binding precedent of our circuit, which a three-judge panel may not overrule absent intervening Supreme Court or en banc authority (of which we have found none).
See Obrey v. Johnson,
Under the
Duren/Sanchez-Lopez
approach, the data Rodriguez has presented satisfies the second prong of the prima facie case for a fair cross-section violation. Our case law has settled on “absolute disparity”- — -the difference between the percentage of the distinctive group in the community and the percentage of that group in the jury pool — as the appropriate measure of the representativeness of the jury pool.
See Sanchez-Lopez,
In Rodriguez’s case, the JS-12 data and the 2000 census data for the age-eligible population show an absolute disparity of 14.55% between the percentage of age-eligible Hispanics in the Fresno Division population (35.21%) and the percentage of Hispanics in the subset of the jury pool for which ethnicity information is available (20.66%). 11 A 14.55% absolute disparity falls within the range of disparities that we have recognized as significant for the purpose of establishing underrepresentation in the context of a prima facie case. Therefore Rodriguez has satisfied the second Duren prong. 12
The third
Duren
prong requires a showing that the underrepresentation results from a systematic exclusion of the distinctive group in the jury-selection process. Under
Duren,
“disproportionate exclusion of a distinctive group from the venire need not be intentional to be unconstitutional, but it must be systematic.”
Randolph,
In this case, Rodriguez has claimed that systematic exclusion of Hispanics results from the Fresno Division’s use of voter registration lists as the sole source of names for its master jury wheel. In support of this contention, Rodriguez offered a 1992 declaration prepared for another case by Professor J. Dennis Willigan, a sociology professor involved in several jury underrepresentation cases, who asserted that the practice of selecting jurors from voter registration lists underrepresents racial and ethnic minorities. Rodriguez also cited
People v. Harris,
in which a plurality of the California Supreme Court concluded that a defendant had satisfied the “systematic exclusion” prong of
Duren
with a sufficient showing that underrepresentation results from the use of voter registration lists as the sole source of names for the jury pool.
However, Rodriguez was not able to provide evidence linking sole reliance on voter registration lists for jury selection to current systematic exclusion of Hispanics in the Fresno Division. Rodriguez’s failure of proof leaves his prima facie case unfinished.
2. Appointment of an Expert
If the issue before us were the underlying question of whether Rodriguez had made out a prima facie case for dismissing his indictment on Sixth Amendment grounds, on this record we would have to answer no. But the question we *946 must answer is whether Rodriguez was entitled to have expert assistance to help him establish the underlying claim.
Rodriguez’s failure to complete his pri-ma facie case is not fatal to his appeal of the denial of his motion to have an expert appointed. Indeed, conditioning the entitlement to an expert on a defendant’s establishing a prima facie case would make little sense: such a rule would provide assistance to a defendant only upon a demonstration that he does not require it. Instead, we must determine whether (1) “reasonably competent counsel would have required the assistance of the requested expert for a paying client,” and (2) the defendant “was prejudiced by the lack of expert assistance.”
Nelson,
Under the circumstances presented here, we conclude that both prongs of the test are satisfied. Although Rodriguez has not established a prima facie case for a fair cross-section violation, he has made a substantial showing sufficient to warrant further inquiry. Rodriguez has shown that Hispanics are substantially underrepresented in the Fresno Division jury pool, and Rodriguez has alleged (with some support, though no particularized evidence) a plausible theory of systematic exclusion: specifically, that the use of voter registration records as the sole source of names for the Fresno Division jury pool systematically underrepresents Hispanics. An expert would be able to investigate whether Hispanics have been systematically excluded and potentially provide the necessary information to complete Rodriguez’s prima facie case. This is precisely the type of situation in which reasonably competent counsel would require the services of an expert for a paying client: the defendant has alleged a dispositive defense that is supported in substantial measure by the evidence available but which cannot be fully developed without the help of an expert.
In order to demonstrate that the district court abused its discretion in failing to appoint an expert, Rodriguez must also show by clear and convincing evidence that the court’s failure to do so prejudiced him. No Ninth Circuit case appears to have addressed the prejudicial effect on a fair cross-section claim of a district court’s failure to appoint an expert. 14
If prejudice means that the defendant must show his defense would have been successful, then obviously Rodriguez’s claim must fail. However, such a narrow understanding would put nearly all defendants in a catch-22 and reduce the statutory provision for federal funding for expert services to an empty promise: the expert’s services would only be available upon the showing of a meritorious defense, and the defense could only be shown with the help of an expert.
In the few cases in which we have had occasion to elaborate on the meaning of the standard of 18 U.S.C. § 3006A(e), we have rejected this narrow understanding. In
United States v. Hartfield,
These cases illustrate that the function of the prejudice inquiry is to prevent appellate courts from second-guessing district judges in cases in which the requested services could not have mattered to the outcome, not to force the defendant to prove that the requested expenditure would necessarily have produced a different result. Thus, while the wealth of evidence against the defendant in Labansat demonstrated that the denial of expert assistance did not prejudice him, the court’s inability to predict what the expert services requested in Hartfield and Bass would reveal did not foreclose relief in those cases.
The circumstances here resemble those in Hartfield and Bass. Like the defendants in those cases, Rodriguez has requested expert services in furtherance of a claim that would, if meritorious, change the outcome of the case. As in Hartfield and Bass, we cannot say for certain whether the expert services, if provided, would vindicate the defendant’s claim. But such uncertainty was not fatal to the defendants’ respective appeals in those cases, and we therefore conclude that it is not fatal here. Of course, defendants should not be permitted to delay proceedings and sap valuable judicial resources with frivolous allegations of claims or defenses that tend to require expert help to establish. Rodriguez’s fair cross-section claim, however, is far from a shot in the dark: Rodriguez has established two of the three prongs of the Duren prima facie case and alleged a plausible theory in support of the third. We hold that, under the circumstances, it was an abuse of discretion not to grant him the expert help he requested to try to make out his fair cross-section claim.
We express no opinion as to the likelihood that Rodriguez’s fair cross-section claim will ultimately succeed, as we do not know what a study of the matter will reveal. We therefore decline currently to vacate Rodriguez’s conviction. We reverse only the denial of his motion to have an expert appointed, and we remand for further proceedings. Once the expert has done his or her work, the district court will be in a position to reassess Rodriguez’s underlying motion to dismiss the indictment. If Rodriguez establishes the prima facie case, the burden will shift to the government in accordance with Duren. If, at that point, the government cannot carry *948 its burden, then the district court must grant Rodriguez’s motion to dismiss the indictment and set aside the conviction. 15
B. Application of Sentencing Guidelines on Acceptance of Responsibility
A district court’s application of the federal Sentencing Guidelines is reviewed de novo.
United States v. Nielsen,
Rodriguez argues that he was entitled to an additional one-level reduction in his sentencing range because of his acceptance of responsibility. The Guidelines provide for a two-level reduction for acceptance of responsibility, see U.S. Sentencing Guidelines Manual § 3El.l(a) (2002), and an additional one-level reduction for defendants at level 16 or greater where the defendant has assisted authorities by “(1) timely providing complete information to the government concerning his own involvement in the offense,” or “(2) timely notifying authorities of his intention to enter a plea of guilty,” or both, id. § 3El.l(b).
A district court commits reversible error if it fails to apply the additional one-level reduction where the defendant has satisfied either subsection of U.S.S.G. § 3El.l(b).
United States v. Ruelas-Arreguin,
This case is unusual. Before the initiation of his prosecution, Rodriguez told an immigration officer that he was a citizen of Mexico, that he had previously been deported from the United States, and that he did not have official permission to return here. Rodriguez thus admitted all the elements of a violation of 8 U.S.C. § 1326, the crime for which he was convicted. See Ninth Circuit Model Criminal Jury Instructions 9.5 (2003). Nonetheless, Rodriguez exercised his right to require the government to carry its burden to prove his guilt. At sentencing, the district court gave a two-level reduction for acceptance, but declined to give a third level “because we went to trial, and we didn’t have [the acceptance of responsibility] timely.” Despite the district court’s statement to Rodriguez that the court was “not going to hold it against you in any way [that] you went to trial,” this is exactly what the court did.
Because Rodriguez “timely provided] complete information to the government concerning his own involvement in the offense,” U.S. Sentencing Guidelines Manual § 3El.l(b)(l) (2002), he was entitled to the additional one-level reduction for acceptance of responsibility.
Ruelas-Arreguin,
Because Rodriguez did not object at sentencing, the panel must review for plain error, which is “(1) error, (2) that is plain, and (3) that affects substantial rights.”
United States v. Ameline,
As we have explained, the district court erred when it gave Rodriguez two levels instead of three for acceptance of responsibility. The district court’s error was plain, because it is contrary to the law at the time of Rodriguez’s appeal.
Id.
(citation and internal quotation marks omitted). We also conclude that Rodriguez’s substantial rights were affected: because he was entitled to a lower Guideline range than that under which he was actually sentenced, the outcome of Rodriguez’s sentencing was affected such that our confidence in that outcome is undermined.
Cf. Glover v. United States,
Finally, we conclude that the error seriously affected the fairness, integrity, or public reputation of the proceedings, because the district court penalized Rodriguez for exercising his constitutional right to go to trial. The unfairness of penalizing a defendant for exercising his legal rights has long been recognized in our national jurisprudence and needs no elaboration.
See, e.g., North Carolina v. Pearce,
We hold that the district court’s’ failure to give the third level of the aceeptance-of-responsibility reduction was plain error. Rodriguez’s sentence must be vacated.
C. Prior Convictions and Apprendi
Rodriguez also claims his sentence is unconstitutional under
Apprendi v. New Jersey,
CONCLUSION
The issue of jury representativeness is one that goes to the heart of one of our nation’s fundamental judicial institutions. “For racial discrimination to result in the exclusion from jury service of otherwise qualified groups not only violates our Constitution and the laws enacted under it but is at war with our basic concepts of a democratic society and a representative government.”
Smith v. Texas,
We hold that the district court abused its discretion in denying Rodriguez’s motion to have an expert appointed, and that the district court committed plain error by giving a two-level rather than a three-level reduction for Rodriguez’s acceptance of responsibility.
We therefore reverse the district court’s denial of Rodriguez’s motion to have an expert appointed, vacate Rodriguez’s sentence, and remand for further proceedings consistent with this opinion, including re-sentencing, the appointment of an expert, and the subsequent reconsideration of Rodriguez’s motion to dismiss the indictment.
REVERSED AND SENTENCE VACATED. REMANDED;
APPENDIX: CALCULATION OF ABSOLUTE DISPARITY FOR HISPANIC REPRESENTATION IN FRESNO DIVISION JURY POOL
Age-eligible population for the eleven Fresno Division counties (2000 Census):
Total Population, age 18 + Hispanic Population, age 18 +
Fresno 542,982 214,927
Tulare 243,769 109,083
Merced 137,870 55,884
Kings 91,933 736,259
Kern Madera 450,266 86,642 150,738 33,164
Stanislaus 307,775 83,599
Inyo 13,569 1,338
Tuolumne 43,201 3,319
Mariposa 13,427 945
Calaveras 31,306 1,769 Percent
*951 Fresno Division Hispanic: Total 1,962,740 691,025 35.21%
Representation in the 2003 Qualified Jury Wheel:
Total Percent Percent of those of Total reporting
Hispanic 971 15.77% 20.66%
Non-Hispanie 3728 60.54% 79.34%
Unknown 1459 23.69% —
Total 6158 100% —
Total reporting ethnicity 4699 776.31% 100%
Percent Hispanic of 18 + Population 35.21
- Percent Hispanic in Jury Pool - 20.66
= Absolute Disparity = 14.55%
Notes
. We take judicial notice of the Eastern District’s most current juror selection plan, which replaced the 1992 plan included in the record. We note that the feature of the plan most salient to Rodriguez’s claims remains unchanged: the 1992 plan, like the current plan, calls for the use of voter registration records as the sole source of names for the master jury wheel.
. Although Rodriguez styled his equal protection claim as one arising under the Fourteenth Amendment, a claim of discrimination by the federal government implicates the
*938
equivalent equal protection guarantee inherent in the Due Process Clause of the Fifth Amendment.
See Bolling v. Sharpe,
Rodriguez also alleged a violation of the JSSA, but we need not consider this claim independently, because "[t]he test for a constitutionally selected jury is the same whether challenged under the Sixth Amendment of the Constitution or under the Jury Selection and Service Act.”
United States v. Sanchez-Lopez,
. Rodriguez alleged an "absolute disparity” of 37.4%, a figure that is not borne out by the data. As we shall explain, the data do reflect substantial underrepresentation of Hispanics, just not to the extent Rodriguez claims.
. The court mischaracterized the government’s data. For the state assembly district in question, the 17% figure represented the proportion of the registered-voter population that was Hispanic, not the proportion of the jury-eligible population that was Hispanic.
. The Ninth Circuit case to which the court referred,
United States v. Jones,
was an unpublished memorandum disposition.
. The following day, on the morning of trial, the court indicated it was supplementing the record of the denial of Rodriguez's motion with additional statistics provided by the government The relevance of these statistics, which reflect demographics for the total population and the registered voter population of State Board of Equalization District Two, is unclear. The Fresno Division includes 11 counties. State Board of Equalization District Two includes 31 entire counties and portions of 3 others. Some counties partially included in District Two, such as San Bernar-dino and Los Angeles, are not even part of the federal Eastern District, much less the Fresno Division.
. Judge Kleinfeld concurred only in the result; Judge Boochever, in a “concurrence and partial dissent,” would have preferred to remand to the district court instead of taking judicial notice of the data reflecting the age-eligible population. See id. at 728-29.
. Prior to
Artero,
one other Ninth Circuit case suggested, without discussion or citation, that the appropriate comparison group for the second
Duren
prong is the "number of eligible minorities.”
United States v. Cannady,
. While its precedential pedigree and fidelity to Supreme Court jurisprudence are what compel us to follow the view reflected in Sanchez-Lopez and Esquivel, our conclusion is fortified by the evident wisdom of this position on its merits.
Whereas census data are readily accessible, jury-eligible population data will often be quite hard for fair-cross-section claimants to obtain, given the difficulty of sorting out from the general population figures the number of individuals who (for example) are not citizens, who are not fluent in English, or who are “incapable, by reason of mental or physical infirmity, to render satisfactory jury service.” 28 U.S.C. § 1865(b) (federal jury qualifications). Other courts have noted the potentially "insuperable” burden that requiring such data could place on fair-cross-section claimants,
United States v. Butera,
So it stands to reason that none of the Supreme Court's cases has charged a fair-cross-section claimant with the affirmative obligation to compile data reflecting the jury-eligible population. In fact, we have found no case, before or after
Duren,
in which the Supreme Court rejected a prima facie showing of underrepresentation because of a failure to provide statistics reflecting the distinctive group’s proportion in the juiy-eligible— as opposed to the general or age-eligible— population. To reiterate the Supreme Court's admonition in
Duren,
"the fair-cross-section requirement involves a comparison of the makeup of jury venires or other sources from which jurors are drawn with the makeup of the
community."
. The main alternative measure of representativeness is "comparative disparity,” which is determined by taking the absolute disparity percentage and dividing it by the percentage of the distinctive group in the total popula
*944
tion.
See Sanchez-Lopez,
Each measure has its limitations. The comparative disparity method can distort the effect of disparities in representation when absolute numbers are low.
See, e.g., Armstrong,
While Ninth Circuit precedent requires us to evaluate representativeness using absolute disparity statistics alone, that approach is not without short-comings.
. Our calculations are set out in an Appendix to this opinion. Two points should be noted. First, we use the age-eligible population figures that are available in the record.
See Esquivel,
Second, to address the problem of the 24% of the qualified jury wheel whose ethnicity was unreported, the ethnicity percentages were recalculated as a percentage of the jurors whose ethnicity was reported. In other words, to avoid distorting the numbers by using the percentage of reported Hispanics as a percentage of all prospective jurors including those not reporting their ethnicity (an approach that would unrealistically assume that none of the jurors not reporting their ethnicity were Hispanic), the individuals not reporting were simply not included in the percentage calculations. Therefore the calculations reflect no assumptions about the ethnicity of those not reporting.
. The district court rejected Rodriguez's claim in part based on the judge’s personal observations about the representativeness of the juries he has seen. The case law provides no support for taking such observations into account under Duren.
. In
People v. Sanders,
the California Supreme Court refused to read
Harris
as standing for the proposition that “sole reliance on voter registration lists in assembling the master jury list is constitutionally prohibited.”
It bears noting that challenges to the use of voter registration lists as the sole source for jury pools have not met with success in the federal courts.
See generally United States v. Cecil,
. In the published cases involving the denial of an expert in this context, panels have denied relief based on the defendant's failure to show that reasonably competent counsel would have required the services of an expert, not on the basis of a failure to demonstrate prejudice.
See Nelson,
. Because our analysis of the fair cross-section claim has led us to conclude that the district court should have appointed an expert, we need not consider whether Rodriguez’s showing on his equal protection claim also entitled him to the requested expert.
. Our substantial rights analysis is unaffected by the advisory nature of the Sentencing Guidelines in the wake of
United States v. Booker,
- U.S. -,
