Food Security, Fertility Differentials and Land Degradation in Sub-Saharan Africa: A Dynamic Framework
| Autor: | Maria Winkler-Dworak |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
education.field_of_study
Food security business.industry media_common.quotation_subject digestive oral and skin physiology Population Fertility Agricultural economics Food distribution Land degradation Food processing Economics Food systems business education Environmental degradation Demography media_common |
| Zdroj: | Institut für Demographie - VID. 1:1-22 |
| Popis: | We study the impact of differential fertility levels for the food-insecure and food-secure population on the long-run values of the population distribution and re sources in a descriptive model where the food security states are determined by a his torically given food distribution and the endogenous food production with resources and labour as inputs. Furthermore, we assume that the resource stock is reduced by poverty-driven environmental degradation. Moreover, we incorporate nutritional ef fects on labour productivity and mortality. By applying local bifurcation theory, we show that the model may exhibit multiple equilibria. Furthermore, the orbits of re sources and the population distribution may be characterised by quasi-periodic be haviour. Sustainable development in terms of approaching a steady state with posi tive values of resources and food-secure population is only promoted by low fertility levels of the food-insecure and food-secure population. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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