Every reference with a DOI in the deposited reference list resolved to a known
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The 10 references without a DOI — listed, not checked
no DOI — not checkedEstimates of the economic return to schooling from a new sample of twins
no DOI — not checkedWinners and losers in Russia’s economic transition
no DOI — not checkedCentral Intelligence Agency, 2000. CIA World Factbook, available at http://www.cia.gov/cia/publications/factbook/geos/ti.html.
no DOI — not checkedProductivity and the density of economic activity
no DOI — not checkedEstimates of the economic return to schooling for the UK
no DOI — not checkedMincer, J., 1974. Schooling, Experience and Earnings. Columbia University Press, New York.
no DOI — not checkedMunich, D., Svejnar, J., Terrell, K., 2000. Returns to human capital under the communist wage grid and during the transition to a market economy. University of Bonn IZA (Institut zur Zukunft der Arbeit—Institute for the Study of Labour), Discussion Paper 122, Bonn.
no DOI — not checkedUnited Nations, 1996. Tajikistan Human Development Report, available at http://www.undp.org/tbec/nhdr/1996/tajikistan/.
no DOI — not checkedWorld Bank, 1998. Republic of Tajikistan: post-conflict emergency reconstruction project—technical annex, Report T-7215-TJ.
no DOI — not checkedWorld Bank, 2000. Tajikistan Country Brief, available at http://www.worldbank.org.
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