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From Farmers to Merchants:A Human Capital Interpretation of Jewish Economic History. (2005). Eckstein, Zvi ; Botticini, Maristella.
In: Boston University - Department of Economics - Working Papers Series.
RePEc:bos:wpaper:wp2005-018.

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  1. The Origins of Ethnolinguistic Diversity: Theory and Evidence. (2008). Michalopoulos, Stelios.
    In: MPRA Paper.
    RePEc:pra:mprapa:11531.

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  2. Long-Term Economic Growth and the History of Technology. (2005). Mokyr, Joel.
    In: Handbook of Economic Growth.
    RePEc:eee:grochp:1-17.

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  3. Jewish Occupational Selection: Education, Restrictions, or Minorities?. (2004). Eckstein, Zvi ; Botticini, Maristella.
    In: IZA Discussion Papers.
    RePEc:iza:izadps:dp1224.

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References

References cited by this document

  1. [1] Acemoglu, Daron; Johnson, Simon H.; and Robinson, James A. Institutions as the Fundamental Cause of Long-Run Growth. NBER Working Paper No. W10481, May 2004.

  2. [10] Beer, Moshe. The Babylonian Amoraim: Aspects of Economic Life. Ramat Gan: Bar Ilan University Press, 1974 (in Hebrew).
    Paper not yet in RePEc: Add citation now
  3. [11] Benjamin of Tudela (ca. 1170). Sefer Massa ot. [The Itinerary of Benjamin of Tudela, edited by M.N. Adler]. London, 1907.
    Paper not yet in RePEc: Add citation now
  4. [12] Ben-Sasson, Haim Hillel. The Middle Ages. In A History of the Jewish People, edited by Haim Hillel Ben-Sasson, pp. 393--723. Cambridge, Mass.: Harvard University Press, 1976.
    Paper not yet in RePEc: Add citation now
  5. [13] Berman, Eli. Sect, Subsidy and Sacrifice: An Economists View of Ultra-Orthodox Jews. Quarterly Journal of Economics 115 (August 2000): 905--53.

  6. [14] Bonné-Tamir, B., J. G. Bodmer, W.F. Bodmer, P. Pickbourne, C. Brautbar, E. Gazit, S. Nevo, and R. Zamir. HLA Polymorphism in Israel. An Overall Analysis. Tissue Antigens 11 (1978): 235--50.
    Paper not yet in RePEc: Add citation now
  7. [15] Bowen, James. A History of Western Education. Vol. 1. New York: St. Martins Press, 1972.
    Paper not yet in RePEc: Add citation now
  8. [16] Carlton, Dennis W., and Avi Weiss. The Economics of Religion, Jewish Survival, and Jewish Attitudes toward Competition in Torah Education. Journal of Legal Studies XXX, no. 1 (Jan. 2001): 253--75.

  9. [17] Chiswick, Barry R. Differences in Education and Earnings Across Racial and Ethnic Groups: Tastes, Discrimination, and Investment in Child Quality. Quarterly Journal of Economics 103 (1988): 571--97.

  10. [18] Chiswick, Carmel Ullman. The Economics of Jewish Continuity. Contemporary Jewry 20 (1999): 30--56.
    Paper not yet in RePEc: Add citation now
  11. [19] Cohen, Gerson D. Rabbinic Judaism. In Judaism, Encyclopedia Britannica, 2002.
    Paper not yet in RePEc: Add citation now
  12. [2] . Reversal of Fortune: Geography and Institutions in the Making of the Modern World Income Distribution. Quarterly Journal of Economics 117 (Nov. 2002): 1231-- 94.
    Paper not yet in RePEc: Add citation now
  13. [21] Feldman, Louis H. Hellenistic Judaism. In Judaism, Encyclopedia Britannica, 2002.
    Paper not yet in RePEc: Add citation now
  14. [22] Galor, Oded, and Omer Moav. Natural Selection and the Origin of Economic Growth. Quarterly Journal of Economics 117 (Nov. 2002): 1133--91.

  15. [23] Gil, Moshe. A History of Palestine, 634--1099. Cambridge: Cambridge University Press, 1992.
    Paper not yet in RePEc: Add citation now
  16. [25] Glaeser, Edward L., and Bruce I. Sacerdote. Education and Religion. Manuscript. Harvard University (February 2002).

  17. [27] Greif, Avner. Reputation and Coalitions in Medieval Trade: Evidence on the Maghribi Traders. Journal of Economic History 49, no. 4 (Dec. 1989): 857--82.

  18. [28] . Contract Enforceability and Economic Institutions in Early Trade: the Maghribi Traders Coalition. American Economic Review 83, no. 3 (June 1993): 525-- 48.
    Paper not yet in RePEc: Add citation now
  19. [3] . The Colonial Origins of Comparative Development: An Empirical Investigation. American Economic Review 91 (Dec. 2001): 1369--1401.
    Paper not yet in RePEc: Add citation now
  20. [30] Hammer, M. F., A. J. Redd, E. T. Wood, M. R. Bonner, H. Jarjanazi, T. Karafet, S. Santachiara-Benerecetti, A. Oppenheim, M.A. Jobling, T. Jenkins, H. Ostrer, and B. Bonné-Tamir. Jewish and Middle Eastern non-Jewish Populations Share a Common Pool of Y-Chromosome Biallelic Haplotypes. Proceedings of the National Academy of Sciences (2000): 1--6.
    Paper not yet in RePEc: Add citation now
  21. [31] Herr, Mosheh David, and Aharon Oppenheimer. Social-Economic and CulturalReligious History from the Destruction of the Second Temple to the Division of the Empire (70-395 ce). In The History of Eretz Yisrael. The Roman-Byzantine Period, The Mishna and Talmud Period, and the Byzantine Rule (70--640), edited by Mosheh David Herr, pp. 107--229. Jerusalem: Keter Publishing, 1990 (in Hebrew).
    Paper not yet in RePEc: Add citation now
  22. [32] Iannaccone, Laurence R. Sacrifices and Stigma: Reducing the Free-Riding in Cults, Communes and Other Collectives. Journal of Political Economy 100, no. 2 (Apr. 1992): 271--91.

  23. [34] Kuznets, Simon. Economic Structure and Life of the Jews. In The Jews: Their History, Culture, and Religion, edited by Louis Finkelstein, pp. 1597--1666. Philadelphia: Jewish Publication Society of America, 1960.
    Paper not yet in RePEc: Add citation now
  24. [35] Lewis, Bernard. The Jews of Islam. Princeton, N.J. : Princeton University Press, 1984.
    Paper not yet in RePEc: Add citation now
  25. [37] Lucas, Robert E., Jr. On the Mechanics of Economic Development. Journal of Monetary Economics 22 (1988): 3--42.

  26. [38] Marrou, H.I. A History of Education in Antiquity. Madison, WI: University of Wisconsin Press, 1982.
    Paper not yet in RePEc: Add citation now
  27. [39] Mokyr, Joel. The Gifts of Athena: Historical Origins of the Knowledge Economy. Princeton, N.J.: Princeton University Press, 2002.
    Paper not yet in RePEc: Add citation now
  28. [4] Agus, Irving A. Urban Civilization in Pre-Crusade Europe. A Study of Organized TownLife in Northwestern Europe During the Tenth and Eleventh Centuries Based on the Responsa Literature. 2 vols. Leiden: E. J. Brill, 1965.
    Paper not yet in RePEc: Add citation now
  29. [40] Nakosteen, Mehdi Khan. History of Islamic Origins of Western Education, A.D. 8001350. Boulder: University of Colorado Press, 1964.
    Paper not yet in RePEc: Add citation now
  30. [41] Neusner, Jacob. The Economics of the Mishna. Atlanta: Scholars Press, 1998.
    Paper not yet in RePEc: Add citation now
  31. [43] Neusner, Jacob (ed.). Judaism and Christianity in the First Century. New York: Garland, 1990.
    Paper not yet in RePEc: Add citation now
  32. [45] Oppenheimer, Aharon. The am ha-aretz: A Study in the Social History of the Jewish People in the Hellenistic-Roman Period. Leiden: E. J. Brill, 1977.
    Paper not yet in RePEc: Add citation now
  33. [46] Rapoport, Hillel, and Avi Weiss. In-Group Cooperation in a Hostile Environment. An Economic Perspective on Some Aspects of Jewish Life in (Pre-Modern) Diaspora. In Economics of Jewish Human Capital, edited by Carmel Chiswick and Tikva Lecker. Ramat-Gan: Bar-Ilan University Press, forthcoming.

  34. [47] Riché, Pierre. Education and Culture in the Barbarian West from the Sixth through the Eighth Century. Columbia, S.C.: University of South Carolina Press, 1976.
    Paper not yet in RePEc: Add citation now
  35. [48] Roth, Cecil. The Jewish Contribution to Civilization. London: Macmillan & Co., 1938.
    Paper not yet in RePEc: Add citation now
  36. [49] Safrai, Shmuel. The Era of the Mishna and Talmud. In A History of the Jewish People, edited by Haim Hillel Ben-Sasson, pp. 307--382. Cambridge, Mass.: Harvard University Press, 1976.
    Paper not yet in RePEc: Add citation now
  37. [5] Alon, Gedaliah. The Jews in their Land in the Talmudic Age (70--640 ce). Vol. II. Jerusalem: Magnes Press, Hebrew University, 1984.
    Paper not yet in RePEc: Add citation now
  38. [50] Sperber, Daniel. Costs of Living in Roman Palestine. Journal of the Economic and Social History of the Orient VIII, no. III (1965): 248--71.
    Paper not yet in RePEc: Add citation now
  39. [51] . Costs of Living in Roman Palestine. Journal of the Economic and Social History of the Orient IX, no. III (1966): 182--211.
    Paper not yet in RePEc: Add citation now
  40. [52] Temin, Peter. Is it Kosher to Talk about Culture? Journal of Economic History 57, no. 2 (June 1997): 267--87.

  41. [53] West, Edwin G. Education and the State: A Study in Political Economy. London: Institute of Political Affairs,1970.
    Paper not yet in RePEc: Add citation now
  42. [7] Baron, Salo Wittmayer. A Social and Religious History of the Jews, 1st edition. 3 vols. New York: Columbia University Press, 1937.
    Paper not yet in RePEc: Add citation now
  43. [8] . A Social and Religious History of the Jews. Vol. II: Ancient Times, Part II. 2nd edition. New York: Columbia University Press, 1952.
    Paper not yet in RePEc: Add citation now
  44. [9] Barro, Robert J., and Rachel M. McCleary. Religion and Economic Growth. Manuscript. Harvard University, April 2003.

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