Using Conditional Lorenz Curves to Examine Consolidation in New Zealand Commercial Fishing

作者：Abayomi Kobi^*; Yandle Tracy

来源：Marine Resource Economics, 2012, 27(4): 303-321.

• Lorenz curves
• Gini coefficient
• Herfindahl Hirschman Index (HHI)
• consolidation
• individual transferable quotas
• catch shares
• New Zealand

We use individual transferable quota (ITQ) consolidation in New Zealand's commercial fishing to illustrate three different methods of measuring consolidation: the Herfindahl Hirschman Index (HHI), conditional Gini Coefficients, and conditional Lorenz curves. The Lorenz curve allows for conditional specification over stratified groupings, which yields straightforward interpretation and illustration of overall inequality for more nuanced interpretations.

• 出版日期2012