NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

NBER Working Papers by Chad Sparber

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Working Papers

May 2014Foreign STEM Workers and Native Wages and Employment in U.S. Cities
with Giovanni Peri, Kevin Y. Shih: w20093
Scientists, Technology professionals, Engineers, and Mathematicians (STEM workers) are fundamental inputs in scientific innovation and technological adoption, the main drivers of productivity growth in the U.S. In this paper we identify the effect of STEM worker growth on the wages and employment of college and non-college educated native workers in 219 U.S. cities from 1990 to 2010. In order to identify a supply-driven and heterogeneous increase in STEM workers across U.S. cities, we use the distribution of foreign-born STEM workers in 1980 and exploit the introduction and variation of the H-1B visa program granting entry to foreign-born college educated (mainly STEM) workers. We find that H-1B-driven increases in STEM workers in a city were associated with significant increases in wages ...
September 2010Assessing Inherent Model Bias: An Application to Native Displacement in Response to Immigration
with Giovanni Peri: w16332
There is a long-standing debate among academics about the effect of immigration on native internal migration decisions. If immigrants displace natives this may indicate a direct cost of immigration in the form of decreased employment opportunity for native workers. Moreover, displacement would also imply that cross-region analyses of wage effects systematically underestimate the consequences of immigration. The widespread use of such area studies for the US and other countries makes it especially important to know whether a native internal response to immigration truly occurs. This paper introduces a microsimulation methodology to test for inherent bias in regression models that have been used in the literature. We show that some specifications have built biases into their models, thereby ...

Published: Peri, Giovanni & Sparber, Chad, 2011. "Assessing inherent model bias: An application to native displacement in response to immigration," Journal of Urban Economics, Elsevier, vol. 69(1), pages 82-91, January. citation courtesy of

September 2007Task Specialization, Comparative Advantages, and the Effects of Immigration on Wages
with Giovanni Peri: w13389
Many workers with low levels of educational attainment immigrated to the United States in recent decades. Large inflows of less-educated immigrants would reduce wages paid to comparably-educated native-born workers if the two groups compete for similar jobs. In a simple model exploiting comparative advantage, however, we show that if less-educated foreign and native-born workers specialize in performing complementary tasks, immigration will cause natives to reallocate their task supply, thereby reducing downward wage pressure. Using individual data on the task intensity of occupations across US states from 1960-2000, we then demonstrate that foreign-born workers specialize in occupations that require manual tasks such as cleaning, cooking, and building. Immigration causes natives -- who ha...

Published: Giovanni Peri & Chad Sparber, 2009. "Task Specialization, Immigration, and Wages," American Economic Journal: Applied Economics, American Economic Association, vol. 1(3), pages 135-69, July.

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