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Food Security, agricultural technology and policy – the case of maize in sub-Saharan Africa

This paper discusses food security and the African food crisis. By means of data from a survey of over 3000 farm households in eight sub-Saharan countries, the authors conclude that food security requires a broad integration of smallholders in the market. Subsistence orientation does not promote food security, while seed fertilizer technology does. Market integration of maize producers seems to be

Linkage between inherited resistance to activated protein C and factor V gene mutation in venous thrombosis

Resistance to activated protein C (APC) is a major cause of familial thrombophilia, and can be corrected by an anticoagulant activity expressed by purified factor V. We investigated linkage between APC resistance and the factor V gene in a large kindred with familial thrombophilia. Restriction fragment length polymorphisms in exon 13 of the factor V gene were informative in 14 family members. The

An Emotional Model of Human-Environment Interaction

Previous models of environmental psychology have put the focus mainly on the cognitive processes, with each step in the process leading to the next in a rather static manner. This may be exemplified by some of the attitude theories developed over the last years (e.g. Ajzen and Fishbein, 1980; Stern, 2000). Among the few exceptions to the cognitive approach is Russell’s Circumplex model of emotiona

Asymmetry Effects in Chinese Stock Markets Volatility: A Generalized Additive Nonparametric Approach

The unique characteristics of the Chinese stock markets make it difficult to assume a particular distribution for innovations in returns and the specification form of the volatility process when modeling return volatility with the parametric GARCH family models. This paper therefore applies a generalized additive nonparametric smoothing technique to examine the volatility of the Chinese stock mark