Abstract
Bihar, India’s poorest state, witnessed impressive yield growth in its three principal crops during the last decade or so. This paper examines whether a reduction in regional yield disparities accompanied these state-level productivity gains. The convergence test allows the district-specific element of productivity to vary with time, thus permitting divergence in interim phases. District rice yields converged towards a common growth path. The results for wheat and maize are not as conclusive. However, there is strong evidence of divergence for each crop in recent years. This divergence, nonetheless, happens in the presence of club convergence. The club classification transcends agro-climatic boundaries, indicating a role for policy to aid growth in the lagging districts. The shifts in credit allocation over the years do not appear to be driving the yield divergence, highlighting the limitations of a macro credit-driven policy.
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Notes
The absence of absolute convergence indicates a rise in the cross-district disparity in yields.
Section 2 sketches the procedure of identifying convergence clubs. See Phillips and Sul (2007) for a detailed discussion.
Level convergence also requires regularity conditions on the common growth component μt.
It is possible to aim for more clubs by increasing the threshold for t-test statistic. I restrict my choice of the critical value to zero to minimize the number of convergence clubs.
The club identification follows a slightly different algorithm relative to Phillips and Sul (2007, 2009). Specifically, I follow the revision suggested in Schnurbus et al. (2017) which makes the manual interventions in the former procedure redundant. The analysis makes use of STATA’s psecta package (Du 2018).
100 period (year) replications with districts used to identify resampling clusters. The results are robust when employing higher or lower replications.
One-tailed test statistic corresponding to 36 degrees of freedom.
Table 8 in the appendix lists the districts according to their club classification for each crop.
Agriculture commands around 60 percent of the priority sector lending, illustrating the sector’s central role in development policy. In contrast, small and medium enterprises account for approximately 25 percent.
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Acknowledgements
Thanks to two anonymous referees and the associate editor for their comments and suggestions, which led to significant improvements. The findings, interpretations, and conclusions expressed in this paper are entirely those of the author. They do not necessarily represent the views of the International Bank for Reconstruction and Development/World Bank and its affiliated organizations, or those of the Executive Directors of the World Bank or the governments they represent.
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Sinha, R. Crop yield convergence across districts in India’s poorest state. J Prod Anal 57, 41–59 (2022). https://doi.org/10.1007/s11123-021-00618-9
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DOI: https://doi.org/10.1007/s11123-021-00618-9