Comments on “Expanding grass-based agriculture on marginal land in the U.S. Great Plains: The role of management intensive grazing”
Date
2021-05
Authors
Chen, Yuyuan
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Abstract
A recent paper by Wang et al. (2021) argues that management intensive grazing (MIG) practice adoption might be ‘ … a key factor for restoring marginal croplands to permanent grassland cover … ’ in the United States Northern Great Plains. The matter is important for land use policy because U.S. Federal and State governments actively seek to promote grass cover through a variety of policy instruments. In this note we show that the significant positive coefficient on MIG adoption they estimate in a multivariate ordered probit model does not indicate a valid causal relationship. Their estimates are vulnerable to bias and inconsistency due to potential endogeneity and so do not support their policy inference.
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21-WP 618
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Working Paper