NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

Jesse B. Tack

Department of Agricultural Economics
Kansas State University
342 Waters Hall
Manhattan, KS 66506

E-Mail: EmailAddress: hidden: you can email any NBER-related person as first underscore last at nber dot org

NBER Working Papers and Publications

August 2017Heterogeneous Yield Impacts from Adoption of Genetically Engineered Corn and the Importance of Controlling for Weather
with Jayson L. Lusk, Nathan P. Hendricks
in Understanding Productivity Growth in Agriculture , Wolfram Schlenker, editor
June 2017Heterogeneous Yield Impacts from Adoption of Genetically Engineered Corn and the Importance of Controlling for Weather
with Jayson L. Lusk, Nathan P. Hendricks: w23519
Concern about declining growth in crop yields has renewed debates about the ability of biotechnology to promote food security. While numerous experimental and farm-level studies have found that adoption of genetically engineered crops has been associated with yield gains, aggregate and cross-country comparisons often seem to show little effect, raising questions about the size and generalizability of the effect. This paper attempts to resolve this conundrum using a panel of United States county-level corn yields from 1980 to 2015 in conjunction with data on adoption of genetically engineered crops, weather, and soil characteristics. Our panel data contain just over 28,000 observations spanning roughly 800 counties. We show that changing weather patterns confound simple analyses of trend yi...

Forthcoming: Heterogeneous Yield Impacts from Adoption of Genetically Engineered Corn and the Importance of Controlling for Weather, Jayson L. Lusk, Jesse Tack, Nathan P. Hendricks. in Understanding Productivity Growth in Agriculture , Schlenker. 2017

March 2011Risk Response in Agriculture
with Jeffrey LaFrance, Rulon Pope
in The Intended and Unintended Effects of U.S. Agricultural and Biotechnology Policies, Joshua S. Graff Zivin and Jeffrey M. Perloff, editors
January 2011Risk Response in Agriculture
with Jeffrey LaFrance, Rulon Pope: w16716
Crop production is subject to supply shocks, and both expected and realized outputs as well as output prices are unknown when inputs are chosen. The process by which producers form expectations is difficult to model, especially when working with aggregate data. We present a necessary and sufficient condition on cost and technology to allow variable input demand equations to be specified as functions of input prices, quasi-fixed inputs, and total variable cost. These all are observable when inputs are committed to production, so that ex ante demands can be estimated with observable data. A flexible, exactly aggregable, and economically regular model of variable input demands is derived and applied to aggregate U.S. agricultural data for the period 1960-1999. We use the empirical results of ...

Published: Risk Response in Agriculture, Jeffrey LaFrance, Rulon Pope, Jesse Tack. in The Intended and Unintended Effects of U.S. Agricultural and Biotechnology Policies, Graff Zivin and Perloff. 2012

 
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