世界経済・社会統計 = World development indicators

计量经济分析 = Econometric analysis

1. Introduction and Overview. 2. Detecting Influential Observations and Outliers. 3. Detecting and Assessing Collinearity. 4. Applications and Remedies. 5. Research Issues and Directions for Extensions. Bibliography. Author Index. Subject Index.

Regression Diagnostics: Identifying Influential Data and Sources of Collinearity

Offering a unifying theoretical perspective not readily available in any other text, this innovative guide to econometrics uses simple geometrical arguments to develop students' intuitive understanding of basic and advanced topics, emphasizing throughout the practical applications of modern theory and nonlinear techniques of estimation. One theme of the text is the use of artificial regressions for estimation, reference, and specification testing of nonlinear models, including diagnostic tests for parameter constancy, serial correlation, heteroscedasticity, and other types of mis-specification. Explaining how estimates can be obtained and tests can be carried out, the authors go beyond a mere algebraic description to one that can be easily translated into the commands of a standard econometric software package. Covering an unprecedented range of problems with a consistent emphasis on those that arise in applied work, this accessible and coherent guide to the most vital topics in econometrics today is indispensable for advanced students of econometrics and students of statistics interested in regression and related topics. It will also suit practising econometricians who want to update their skills. Flexibly designed to accommodate a variety of course levels, it offers both complete coverage of the basic material and separate chapters on areas of specialized interest.

Estimation and Inference in Econometrics

Indigenous groups offer alternative knowledge and perspectives based on their own locally developed practices of resource use. We surveyed the international literature to focus on the role of Traditional Ecological Knowledge in monitoring, responding to, and managing ecosystem processes and functions, with special attention to ecological resilience. Case studies revealed that there exists a diversity of local or traditional practices for ecosystem management. These include multiple species management, resource rotation, succession management, landscape patchiness management, and other ways of responding to and managing pulses and ecological surprises. Social mechanisms behind these traditional practices include a number of adaptations for the generation, accumulation, and transmission of knowledge; the use of local institutions to provide leaders/stewards and rules for social regulation; mechanisms for cultural internalization of traditional practices; and the development of appropriate world views and cultural values. Some traditional knowledge and management systems were characterized by the use of local ecological knowledge to interpret and respond to feedbacks from the environment to guide the direction of resource management. These traditional systems had certain similarities to adaptive management with its emphasis on feedback learning, and its treatment of uncertainty and unpredictability intrinsic to all ecosystems.

http://wildrodopi.org/data/documents/Rediscovery-Traditional-Ecological=20Knowledge.pdf

Rediscovery of traditional ecological knowledge as adaptive management

Agrobiodiversity, diet, and human health.

1 Biodiversity, Agriculture, and Ecosystem Services

Forests and tree-based systems are an important component of rural landscapes, sustaining livelihoods and contributing to the food security and nutritional needs of hundreds of millions of people worldwide. Historically, these systems developed under a wide variety of ecological conditions, and cultural and socio-economic contexts, as integrated approaches that combined management of forest and agricultural areas to provide primarily for the needs of producers and their local communities. Today they serve food and nutrition demands of growing global populations, both urban and rural. Population increase, globalisation, deforestation, land degradation, and ever-increasing demand and associated conflict for land (including forest) resources are placing pressure on these lands. Farmers have been encouraged to intensify food production on existing agricultural lands, by modifying some traditional practices (such as agroforestry) or abandoning others (such as shifting cultivation) that evolved over centuries to cope with biophysical constraints (e.g. limited soil fertility, climate variability) and changing socio-economic conditions. This chapter provides an overview of forests and tree-based systems and their role in enhancing food security and nutrition for rural communities and those served through the marketplace. The variability and viability of these management systems are considered within and across geographical regions and agro-ecological zones. Also discussed is the role of the social, cultural and economic contexts in which these systems exist, with a focus on three factors that affect the socio-economic organisation of forests and tree-based systems, namely: land and tree tenure and governance, human capital (including knowledge and labour) and financial capital (including credit). How these biophysical and socio-economic conditions and their complex interactions influence food security and nutrition outcomes, particularly for vulnerable segments of the population (i.e., the poor, women and children), are of particular concern.

/pdf/the-historical-environmental-and-socio-economic-context-of-5buwerxiio.pdf

The Historical, Environmental and Socio-economic Context of Forests and Tree-based Systems for Food Security and Nutrition

As upland farmers in Southeast Asia change from shifting cultivation to permanent agriculture and lose access to swidden-fallow forests and their resources, they are introducing economically important forest and fallow plants into their house gardens. We describe this process in Daka, a village of Hani ethnicity in Yunnan Province, China. Daka smallholders collect both seeds and seedlings from fallow forests and transfer the plants to house gardens, initiating the transformation of wild species to a cultivated or semi-domesticated one. Two kinds of species are commonly transferred from swidden fallows to house gardens. Some are particularly rare, others are plants in great demand. Between 1998 and 2000 Daka households earned an average of US$68.20 annually from the products of fallow forests. We also found that villagers harvest and use 76 plant species from fallow forests and 126 species from house gardens. Twenty-two species found in house gardens that had been transferred from fallow forests. Households vary widely in the frequency with which they engage in this pattern. We believe that local knowledge of these practices is a potentially important resource in the development of other areas of smallholder farming.

/pdf/relocating-plants-from-swidden-fallows-to-gardens-in-50gloid24q.pdf

Christine Padoch

Papers

Agrobiodiversity, diet, and human health.

1 Biodiversity, Agriculture, and Ecosystem Services

The Historical, Environmental and Socio-economic Context of Forests and Tree-based Systems for Food Security and Nutrition

Relocating Plants from Swidden Fallows to Gardens in Southwestern China

Can rural outmigration improve household food security? Empirical evidence from Ethiopia