A Generalized Measure of Diversity: Application to Longitudinal Data on Crop-groups in North-East India

De, U. K. and Manoranjan Pal (2017), “A Generalized Measure of Diversity: Application to Longitudinal Data on Crop-Groups in North-East India”, Journal of the Indian Society of Agricultural Statistics, Vol. 71, No. 3, pp. 253-263

11 Pages Posted: 21 Jul 2020

See all articles by U. K. De

U. K. De

North-Eastern Hill University (NEHU) - Department of Economics

Date Written: 2017

Abstract

In this paper, we generalize the Herfindahl-Hirschman Index (HHI) using the correlation structure of the individual shares to arrive at a new diversity measure. This is then applied to the cultivation of crops across zones of Assam, India. Before applying these indices we have removed the trend component from the data series. Since the trend effect is eliminated, the indices show the true diversity pattern and reflect the intentions of farmers directly which was not taken into consideration in the earlier measures.

The results show that the diversity indices declined till 1975-76 and then gradually increased up to 1987-88. Thereafter, all the indices became more or less stagnant. It may be because the farmers did not want to take risk or they have less access to the modern farming technology which is also subject to changes over time.

Keywords: Crop diversity, Herfindahl-Hirschman index, Hall and Tideman index, Cropping pattern of Assam

JEL Classification: C00, C02, C13, C19

Suggested Citation

De, Utpal Kumar, A Generalized Measure of Diversity: Application to Longitudinal Data on Crop-groups in North-East India (2017). De, U. K. and Manoranjan Pal (2017), “A Generalized Measure of Diversity: Application to Longitudinal Data on Crop-Groups in North-East India”, Journal of the Indian Society of Agricultural Statistics, Vol. 71, No. 3, pp. 253-263 , Available at SSRN: https://ssrn.com/abstract=3637251 or http://dx.doi.org/10.2139/ssrn.3637251

Utpal Kumar De (Contact Author)

North-Eastern Hill University (NEHU) - Department of Economics ( email )

Shillong, 703014
India

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