Herfindahl–Hirschman index level of concentration values modification and analysis of their change

Brezina, Ivan; Pekár, Juraj; Čičková, Zuzana; Reiff, Marian

doi:10.1007/s10100-014-0350-y

Cited by 58 publications

(33 citation statements)

References 8 publications

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“…where HHI i refers to the normalized Herfindahl-Simpson diversification index, which ranges from zero (specialization in one activity) to one (full or complete diversification). As stated by Djido and Shiferaw [67] and Brezina et al [69], higher normalized index values indicate a greater amount of diversification. For the three simultaneous livelihood choices (i.e., on-farm, off-farm, and non-farm livelihood activities) we estimated a multivariate probit model.…”

Section: Empirical Modelmentioning

confidence: 73%

Exploring Drivers of Livelihood Diversification and Its Effect on Adoption of Sustainable Land Management Practices in the Upper Blue Nile Basin, Ethiopia

et al. 2019

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Land degradation poses a major threat to agricultural production and food security in Ethiopia, and sustainable land management (SLM) is key in dealing with its adverse impacts. This paper examines the covariates that shape rural livelihood diversification and examines their effects on the intensity of adoption of SLM practices. Household-level data were collected in 2017 from 270 households in three drought-prone watersheds located in northwestern Ethiopia. We used the Herfindahl–Simpson diversity index to explore the extent of livelihood diversification. A stochastic dominance ordering was also employed to identify remunerative livelihood activities. A multivariate probit model was employed to estimate the probability of choosing simultaneous livelihood strategies, and an ordered probit model was estimated to examine the effect of livelihood diversification on the adoption intensity of SLM practices. In addition to mixed cropping and livestock production, the production of emerging cash crops (e.g., Acacia decurrens for charcoal, and khat) dominated the overall income generation of the majority of farmers. Stress/shock experience, extent of agricultural intensification, and agro-ecology significantly affected the probability of choosing certain livelihood strategies. Livelihood diversification at the household level was significantly associated with the dependency ratio, market distance, credit access, extension services, membership in community organizations, level of income, and livestock ownership. A greater extent of livelihood diversification had a significant negative effect on adopting a greater number of SLM practices, whereas it had a positive effect on lower SLM adoption intensity. Overall, we found evidence that having greater livelihood diversification could prompt households not to adopt more SLM practices. Livelihood initiatives that focus on increasing shock resilience, access to financial support mechanisms, improving livestock production, and providing quality extension services, while also considering agro-ecological differences, are needed. In addition, development planners should take into account the livelihood portfolios of rural households when trying to implement SLM policies and programs.

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Section: Empirical Modelmentioning

confidence: 73%

Exploring Drivers of Livelihood Diversification and Its Effect on Adoption of Sustainable Land Management Practices in the Upper Blue Nile Basin, Ethiopia

et al. 2019

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“…Where MS i is the i-th company market share (%), S i is a sales or production capacity of the i-th company (Brezina et al, 2016), and S tot is the total sales or total production of the entire company. Table 1 presents some components used in the analysis of market share.…”

Section: Data Analysis Methodsmentioning

confidence: 99%

Potato Trading Based on Structure Conduct Performance (SCP) in the Centre of Vegetable Production at Central Java Indonesia

Pujiharto¹,

Wahyuni²

2020

RWE

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This study aims to examine potato trading based on Structure, Conduct, Performance (SCP) in the highland vegetable production centers of Central Java Province. Potato trading in highland vegetable production centers in Central Java province has been analyzed using Structure, Conduct, and Performance (SCP) techniques. The data was collected through a survey and observation. The market structure was analyzed by market share, the Herfindahl-Hirschman Index (HHI) and the Concentration Ratio for Biggest Four (CR4). Analysis of market behavior includes the presence or absence of collusive practices in determining prices, the process of selling and buying, the formation of equilibrium prices, payment systems (cash, credit), and cooperation with other trading institutions. While market performance is analyzed by marketing margins and farmer's share. The samples of potato farmers were determined by the random sampling method and the traders determined by the snowball sampling method. The number of samples used was 82 potato farmers, 45 collecting traders, 10 wholesaling traders, and 14 retailing traders. The results of market structure research on potato trading are oligopsonies. Price behavior at farmers (producer) level is more controlled by collectors who deal directly with farmers. Wholesalers dominate purchases from collectors, the payments are made in cash or paid later. Moreover, the collusive practice between collectors and wholesalers occurs, especially in the provision of capital or credit. Furthermore, the performance of the potato market based on the trading system margin is greatest in pattern 2, while the farmer’s share is greatest in pattern 1 in the potato trading system.

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“…(CRn ) [20][21][22][23][24][25] 、赫芬达尔 -赫希曼指数(HerfindalHirschman Index， HHI，以下简称 HHI 指数) [24][25][26][27] 、勒纳指数(Lerner Index) [25] 和熵指数(Entropy Index) [25] …”

Section: 目前，市场结构的分析方法主要有行业集中率unclassified

中国铝土矿贸易与供应安全研究

王东方¹,

Dongfang²,

陈伟强³

et al. 2018

zykx

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Herfindahl–Hirschman index level of concentration values modification and analysis of their change

Cited by 58 publications

References 8 publications

Exploring Drivers of Livelihood Diversification and Its Effect on Adoption of Sustainable Land Management Practices in the Upper Blue Nile Basin, Ethiopia

Exploring Drivers of Livelihood Diversification and Its Effect on Adoption of Sustainable Land Management Practices in the Upper Blue Nile Basin, Ethiopia

Potato Trading Based on Structure Conduct Performance (SCP) in the Centre of Vegetable Production at Central Java Indonesia

中国铝土矿贸易与供应安全研究

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