The Czech secondary school system expanded access to programs ending with a school-leaving certificate (maturita) between 2000 and 2009, and analysis of PISA data showed a pattern predicted by Effectively Maintained Inequality (EMI): vertical (quantitative) inequality in attaining any certificate weakened while horizontal (qualitative) inequality strengthened, with advantaged families increasingly concentrating their children in the most academic track — multi-year grammar schools. The 2016 study that documented this pattern could not test its causal mechanisms: with cross-sectional data, the authors proposed as their own untested interpretation at least four strategies through which advantaged families may drive this horizontal diversification (private grammar schools, paid preparatory courses, fee-charging primary schools, value-based parental investment), and they formulated only a conditional forecast for the following decade, leaving open whether the pattern persisted into the 2010s. A related strand — whether schools amplify inequality through value added or merely reproduce it through admission selection — is treated in the source as established background rather than as its own open question. This problem asks for a mechanism-oriented empirical research program that establishes whether the Czech EMI pattern is persistent and causal, and which mechanisms generate it.

Background

Two classical theories frame how educational expansion interacts with social origin. Maximally Maintained Inequality (MMI), formulated by Raftery and Hout (1993) from Irish schooling history, predicts that expansion reduces class-graded inequality in attaining a given educational level only once advantaged families have nearly universal access to it. Effectively Maintained Inequality (EMI), formulated by Lucas (2001) from U.S. data, adds that even after quantitative access equalizes, socioeconomically advantaged families secure qualitatively better variants of the same level — more selective tracks, branches, or schools — so that inequality shifts from a vertical (who attains the level) to a horizontal (which variant is attained) form (Lucas & Byrne 2017). The Czech Republic is a critical case for these theories: its post-1989 system is early-tracking and highly stratified, with upper-secondary programs divided into vocational programs without a school-leaving certificate (SLC; the maturita examination is the certificate granting access to tertiary study), technical programs with the SLC, four-year grammar schools (gymnázium, the academic secondary school) with the SLC, and — crucially — selective six- and eight-year grammar schools that admit pupils at age 11 or 13, years before the PISA survey (the OECD's Programme for International Student Assessment, testing 15-year-olds in reading, mathematics, and science every three years). Since 1989 Czech educational inequalities have remained high (Simonová 2003), and comparative work confirms the Czech case as an extreme one of expansion without equalization (Smith, Tsai, Matějů & Huang 2016). Against this backdrop, Katrňák, Simonová and Fónadová first developed the argument in Czech (2013) and then, in a 2016 English-language study, combined descriptive statistics with multinomial logistic models of PISA 2000 and PISA 2009 cohorts (parental education, father's ISEI — the International Socioeconomic Index of occupational status — and pupils' reading literacy as covariates) to test MMI and EMI jointly. They found that between 2000 and 2009 the odds ratio for children of university-educated parents attaining any SLC program fell (from about 1.57 to 1.42), while the concentration of advantaged pupils in six- and eight-year grammar schools increased (the share whose father's ISEI was in the top quintile rose from 65% to 69%), and parental background mattered more than measured reading skill for placement in the most academic track — vertical weakening coupled with horizontal strengthening, the signature of EMI. The authors proposed, as their own untested interpretation, at least four mechanisms (strategies) for the horizontal pattern: (1) growth of private grammar schools (52 to 78 schools between 2000/01 and 2009/10, enrolment share 5.6% to 8.3%); (2) expansion of paid preparatory courses and benchmark tests for selective admissions; (3) fee-charging primary schools; and (4) value-based parental investment. But they could not test these mechanisms causally: PISA is cross-sectional, reading literacy is measured after pupils have already spent years in the selective track, private-school counts reveal nothing about the social origin of their students, and no school value-added (the learning growth attributable to a school rather than to its intake) was estimated. Adjacent Czech research documents the stratifying machinery descriptively — fifth graders' applications to eight-year grammar schools are strongly socially graded (Straková, Greger & Soukup 2017), mainstream schools themselves sell preparatory courses for entrance examinations (Šťastný 2022), middle-class parents pursue distinctive school-choice and parenting strategies (Slámová & Simonová 2024; Hašková, Dudová & Marková Volejníčková 2026), and parents frame private alternative schools as identity projects (Bradová & Šimková 2025) — while economics work shows how consequential selective admissions are (Jurajda & Münich 2010; Federičová & Münich 2018). What no existing study does is connect these pieces: replicate the vertical/horizontal test for transitions after 2009 and estimate the effects of the authors' proposed mechanisms on admission to academic tracks. Separating school value-added from admission selection is a related strand — which the source itself treats as established background from cited literature, since differences between maturita schools are maintained at entry — that likewise remains unestimated across Czech secondary tracks.

Problem Statement

Determine whether the Effectively Maintained Inequality pattern that Katrňák, Simonová and Fónadová (2016) documented in the Czech secondary school system for 2000–2009 — weakening vertical (quantitative) inequality in attaining any school-leaving-certificate program alongside strengthening horizontal (qualitative) stratification of certificate tracks by social origin — persisted beyond 2009, and establish the mechanisms that generate it. The research target has two components: (1) re-estimate, for cohorts and school transitions after 2009 and with data comparable to the 2000/2009 baseline, both the vertical parental-background differentials in attaining any SLC program and the horizontal parental-background differentials among SLC tracks (six/eight-year grammar schools, four-year grammar schools, technical SLC schools), testing whether vertical weakening together with horizontal strengthening continued; and (2) test the strategies the authors proposed but could not verify with their cross-sectional data — introduced in the source as at least four ways rather than a closed, exhaustive class: the growth of private grammar schools, paid preparatory courses and repeatable paid comparative (benchmark) tests for selective admissions, fee-charging private primary schools, and value-based parental investment and aspirations — with respect to their role in concentrating pupils from advantaged families in the academic tracks, by estimating their effects on admission probabilities and on the pupil composition of the selective schools. These two components serve one objective: establishing whether the Czech EMI pattern is persistent and causal, and which mechanisms generate it. Two related strands lie outside this research target: separating school value-added from admission selection in track-specific achievement growth — the source treats the maintenance of differences between maturita schools at their entrance as established background from cited literature — and testing the authors' conditional forecast that, if the trend continued into the following decade, the symbolic distance between the maturita and non-maturita branches would grow, producing social stigmatization (or, worse, exclusion and prejudice) of pupils in non-maturita vocational tracks and low educational aspirations among them.

References

  1. Katrňák, Tomáš; Simonová, Natalie; Fónadová, Laura (2016). 'From quantitative to qualitative differences: Testing MMI and EMI in the Czech secondary school system in the first decade of the 21st century.' Research in Social Stratification and Mobility 46: 157–171. DOI 10.1016/j.rssm.2016.08.009. https://doi.org/10.1016/j.rssm.2016.08.009
  2. Katrňák, Tomáš; Simonová, Natalie; Fónadová, Laura (2013). 'From Differentiation to Diversification: Testing MMI and EMI in the Czech Secondary School System in the First Decade of the 21st Century.' Czech Sociological Review 49(4): 491–520. DOI 10.13060/00380288.2013.49.4.01. https://doi.org/10.13060/00380288.2013.49.4.01
  3. Raftery, Adrian E.; Hout, Michael (1993). 'Maximally Maintained Inequality: Expansion, Reform, and Opportunity in Irish Education, 1921-75.' Sociology of Education 66(1): 41–62. DOI 10.2307/2112784. https://doi.org/10.2307/2112784
  4. Lucas, Samuel R. (2001). 'Effectively Maintained Inequality: Education Transitions, Track Mobility, and Social Background Effects.' American Journal of Sociology 106(6): 1642–1690. DOI 10.1086/321300. https://doi.org/10.1086/321300
  5. Lucas, Samuel R.; Byrne, Delma (2017). 'Effectively Maintained Inequality in Education.' American Behavioral Scientist 61(1): 3–7. DOI 10.1177/0002764216682992. https://doi.org/10.1177/0002764216682992
  6. Simonová, Natalie (2003). 'The Evolution of Educational Inequalities in the Czech Republic after 1989.' British Journal of Sociology of Education 24(4): 471–485. DOI 10.1080/01425690301919. https://doi.org/10.1080/01425690301919
  7. Smith, Michael; Tsai, Shu-Ling; Matějů, Petr; Huang, Min-Hsiung (2016). 'Educational Expansion and Inequality in Taiwan and the Czech Republic.' Comparative Education Review 60(2): 339–374. DOI 10.1086/685695. https://doi.org/10.1086/685695
  8. Katrňák, Tomáš; Simonová, Natálie (2017). 'Trends in Educational Fluidity after the Fall of Socialism in the Czech Republic.' Orbis Scholae 10(3): 49–69. DOI 10.14712/23363177.2017.10. https://doi.org/10.14712/23363177.2017.10
  9. Straková, Jana; Greger, David; Soukup, Petr (2017). 'Factors affecting the transition of fifth graders to the academic track in the Czech Republic.' International Studies in Sociology of Education 26(3): 288–309. DOI 10.1080/09620214.2017.1290541. https://doi.org/10.1080/09620214.2017.1290541
  10. Šťastný, Vít (2022). 'Shadow education: a double-edged sword for Czech mainstream schools in the competitive educational market.' Research Papers in Education 37(6): 1042–1063. DOI 10.1080/02671522.2021.1907777. https://doi.org/10.1080/02671522.2021.1907777
  11. Smith Slámová, Radka; Simonová, Jaroslava (2024). 'School choice and parenting strategies among Czech middle-class parents: Implications for social segregation in public schools.' Sociology Compass 18(8): e13248. DOI 10.1111/soc4.13248. https://doi.org/10.1111/soc4.13248
  12. Hašková, Hana; Dudová, Radka; Marková Volejníčková, Romana (2026). 'Exceptional and decent people: mothering and school choice in the reproduction of social inequality.' British Journal of Sociology of Education 47(2): 269–288. DOI 10.1080/01425692.2025.2590631. https://doi.org/10.1080/01425692.2025.2590631
  13. Bradová, Jarmila; Šimková, Gabriela (2025). 'Choosing private alternative schools in Czechia: parents' narrative identity study.' Oxford Review of Education 51(5): 746–762. DOI 10.1080/03054985.2024.2407620. https://doi.org/10.1080/03054985.2024.2407620
  14. Jurajda, Štěpán; Münich, Daniel (2010). 'Admission to selective schools, alphabetically.' Economics of Education Review 29(6): 1100–1109. DOI 10.1016/j.econedurev.2010.06.005. https://doi.org/10.1016/j.econedurev.2010.06.005
  15. Federičová, Miroslava; Münich, Daniel (2018). 'Rozdíly v matematické a čtenářské gramotnosti chlapců a dívek a raná selekce: trendy v obou zemích po rozdělení Československa.' Orbis Scholae 8(1): 27–45. DOI 10.14712/23363177.2015.3. https://doi.org/10.14712/23363177.2015.3
  16. Guetto, Raffaele; Vergolini, Loris (2017). 'Educational expansion without equalization: a reappraisal of the Effectively Maintained Inequality hypothesis in children's choice of the upper secondary track.' European Societies 19(1): 1–27. DOI 10.1080/14616696.2016.1236283. https://doi.org/10.1080/14616696.2016.1236283
  17. Lörz, Markus; Burkhard, Jannis; Maaz, Kai (2026). 'Educational participation, cultural resources, and social inequality: Have social inequalities in reading literacy increased or decreased between 2000 and 2022?' Acta Sociologica. DOI 10.1177/00016993261435544. https://doi.org/10.1177/00016993261435544
  18. Straková, Jana (2015). 'Strong vocational education – a safe way to the labour market? A case study of the Czech Republic.' Educational Research 57(2): 168–181. DOI 10.1080/00131881.2015.1030853. https://doi.org/10.1080/00131881.2015.1030853
  19. Trhlíková, Jana (2019). 'Absolventi středních odborných škol a jejich přechod na trh práce.' Pedagogika 69(2). DOI 10.14712/23362189.2018.854. https://doi.org/10.14712/23362189.2018.854