Abstract
The present study contributes to the literature on labour reallocation and adaptation in response to weather anomalies. Existing literature on labour mobility and weather shocks primarily focus on migration to the neglect of worker commuting as a potential adaptation strategy. Utilizing individual-level panel data from the Village Dynamics in South Asia (VDSA) dataset for the year 2010–2014, the present study explores the impact of weather anomalies on migration and commuting as well as participation and earnings in the non-agricultural sector. The fixed effects regression results show that negative temperature shocks induce a flow of labour outside the village through labour out-migration and longer-distance commutes. Temperature stress also negatively impacts non-agricultural earnings. The effects of temperature shocks are heterogeneous across the baseline climate of the villages suggesting evidence of adaptation to weather shocks. The study emphasizes the crucial role of labour mobility and adaptation in coping with weather shocks. The paper concludes with some policy suggestions.
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I distinguish between low-tier and high-tier non-agricultural activity with the later being associated with high returns but requiring substantial start-up investments or upfront costs while the former requires little upfront investments but generates low returns. In a similar way, we can distinguish international migration from internal migration with the former akin to a high-return-high-investment sector while the later corresponds to the low-tier sector.
Following Auffhammer et al., (2013), I check the robustness of my results by considering two alternative re-analysis datasets: ERA5 and MERRA2. ERA5 is a re-analysis dataset, providing information on hourly temperature on a \({0.25}^{o}\times {0.25}^{o}\) latitude–longitude grid over the period 1979–2020 (Hersbach et al. 2020). Similarly, MERRA2 is a re-analysis dataset, providing information on hourly temperature on a \({0.5}^{o}\times {0.625}^{o}\) latitude–longitude grid over the period 1980–2020 (Gelaro et al. 2017).
I utilize village level maps from the India Village-Level Geospatial Socio-Economic Data Set, v1 (1991, 2001) to derive precise co-ordinates of each village in my dataset (Meiyappan et al. 2018). I further cross-check the co-ordinates using information on the location of the villages available in the VDSA website (ICRISAT 2020).
The study applies of a relative temperature threshold based on the long-term temperature distribution of the place rather than an absolute threshold temperature value, as has been used in the literature. This is justified based on the logic that different places adjust their agricultural operations based on their baseline climate and temperatures above a relative threshold would be better able to capture the shock of unusually high temperatures. Furthermore, I utilize temperature thresholds specific to a particular month over the growing season, so that I am able to capture the adverse impact of extreme temperature on plant growth for different stages of its life cycle. I show that my results are robust using absolute temperature thresholds.
Additional robustness checks test the sensitivity of the results to the inclusion of additional covariates.
Restricting my analysis to the sample of commuters, I find that an additional HDD is associated with a significant increase of 0.1 per cent in the distance travelled to the workplace (Table A2: Column 4).
Although a 100 unit rise in HDD seem unrealistically large, I find that more than half of the 30 villages in my study have an inter-temporal range of HDD of at least 100 units. As such, such large fluctuations in HDDs can be considered to be quite common in the context of my study.
The heat wave variable captures temperature anomaly is a different way as it only considers extreme temperatures experienced during a heat spell of at least 5 consecutive days during which the temperature consistently exceeds a threshold. As such, the effect of standalone days with extremely high temperatures is not taken into consideration. This is important as extreme temperatures may be especially harmful if experienced during a heat spell than otherwise.
The outcome variables are defined in Table A1.
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Acknowledgements
I would like to thank the editor, Dr. Detlef van Vuuren, and two anonymous referees for their valuable comments and suggestions. I also thank Prof. Arup Mitra, Prof. E. Somanathan and Prof. S. Chandrasekhar, as well as participants at the 16th Annual Conference on Economic Growth and Development, ISI Delhi, New Delhi, India (2021) and 8th Pan IIM World Management Conference, IIM Kozhikode, Kozhikode, India (2021) for fruitful discussions. The usual disclaimers apply.
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Neog, B.J. Temperature shocks and rural labour markets: evidence from India. Climatic Change 171, 16 (2022). https://doi.org/10.1007/s10584-022-03334-x
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DOI: https://doi.org/10.1007/s10584-022-03334-x