Estimating the Impact of Transgenic Bt Cotton on West and Central Africa: A General Equilibrium Approach

West and Central Africa (WCA)’s cotton sector is experiencing rising production costs and lower yields, reversing decades of growth. Declining input use, soil fertility and inefficient chemical pest controls are contributing factors. We evaluate the potential impact of Bt cotton on WCA using a multiregion general equilibrium model and multicountry estimates of Bt-induced productivity. We find that Bt cotton raises growers’ returns, land value and welfare. Released labor from cotton is shifted to food crops hence reducing labor shortage constraints. Overall, results indicate that potential gross benefits from Bt cotton are substantial for WCA cotton sector, and that the economic costs of nonadoption are equally significant.     

我国农村劳动力＂反梯度＂流动的经济学分析——以新疆采棉工为例

农村劳动力“反梯度”流动是我国经济和社会转型期间出现的一种特殊现象。从流向看，它有悖于劳动力由乡一城、由落后地区一发达地区流动的规律。文章采用经济学分析方法，以新疆采棉工为研究对象，从理论和现实两个层面研究分析采棉工理性的流动决策行为以及基本特征和相关影响因素。     

Competitiveness of Egyptian cotton exports in the international market

Cotton plays a vital role in the Egyptian economy by meeting domestic and export demands,contributing significantly to agriculture,industry,export earnings,and providing a cash income to roughly one million small farmers.This paper examines the competitiveness of Egyptian cotton exports（ECE） in the international market during the period 1990-2006.It mainly aims at investigating the trends in cotton exports over the studied period,analyzing the competitive position of Egyptian cotton by employing several economic and trade indices,and identifying the key factors that influence Egypt＇s cotton exports to the world.The results revealed that the total quantity of ECE has fallen from 196.8 thousand tons in 2003 to 87.2 thousand tons in 2006.It also shows a high degree of geographic concentration of ECE,into India,Italy,the Republic of Korea,and Japan.Together,these markets imported about 50%of ECE during 1990-2006.The competitive advantage of Egyptian cotton would appear dependent on quality not price.Japan,the Republic of Korea and Italy presented the most stable markets for ECE.Linear regression analysis suggests that a one percent increase in the Egypt-to-USA export price ratio leads to a decrease in ECE by about 27.8 thousand tons.Such analysis has also shown a positive and significant effect of the World Trade Organization on ECE.     

Ecosystem impacts of pesticide reductions through Bt cotton adoption

This article examines the ecosystem impacts of transgenic Bt cotton technology resulting from reduced chemical pesticide use. Employing unique panel data from smallholder farmers in India, negative environmental and health effects of pesticide use are quantified with the environmental impact quotient (EIQ), with and without Bt technology. An environmentally sensitive dynamic production function is estimated, treating the environmental risk of pesticide toxicity as an undesirable output in the production process. Negative externalities are significantly lower in Bt than in conventional cotton. The reduction in EIQ through Bt technology adoption has increased from 39 per cent during 2002–2004 to 68 per cent during 2006–2008. Bt adoption has also contributed to higher environmental efficiency. Environmental efficiency is influenced by the quality of Bt technology: high‐quality Bt seeds are associated with higher environmental efficiency than lower‐quality seeds.     

A Question of Integrity: Variants of Bt Cotton,Pesticides and Productivity in Pakistan

Bt cotton remains one of the most widely grown biotech crops among smallholder farmers in lower income countries, and numerous studies attest to its advantages. However, the effectiveness of Bt toxin, which depends on many technical constraints, is heterogeneous. In Pakistan, the diffusion of Bt cotton occurred despite a weak regulatory system and without seed quality control; whether or not many varieties sold as Bt are in fact Bt is also questionable. We utilise nationally representative sample data to test the effects of Bt cotton use on productivity. Unlike previous studies, we invoke several indicators of Bt identity: variety name, official approval status, farmer belief, laboratory tests of Bt presence in plant tissue, and biophysical assays measuring Bt effectiveness. Only farmer belief affects cotton productivity in the standard production model, which does not treat Bt appropriately as damage‐abating. In the damage control framework, all Bt indicators reduce damage from pests. Biophysical indicators have the largest effect and official approval has the weakest. Findings have implications for impact measurement. For policy‐makers, they suggest the need, on ethical and productivity grounds, to improve variety information and monitor variety integrity closer to point of sale.     

我国发展循环经济的战略重点之一在农业

现有的农业循环经济的发展模式有大农业型、生态恢复型和废弃物再利用型三种。由于农业循环经济的内涵重点在于农业废弃物资源化及其循环再利用,所以我国农业循环经济的发展模式应以废弃物再利用型模式为主,其中又以大力开发可再生能源、综合利用秸秆生物质能源发展农业循环经济为重点之一。     

Catch-up strategies and the latecomer effect in industrial development

Since 2003, the West and Central African (WCA) cotton initiative in the World Trade Organization has stood as an ambitious case of Africa's desire to be integrated into the trading system and yet also receive reparations for past injuries. This article seeks to explore how and why the initiative debuted through close attention to the interdependence between power and language in diplomatic practice. It takes the concept of cognitive framing to explore the relationship between political legitimacy and mobilisation capacities. The genesis of cotton as ‘an issue’ is critically examined, focusing on how the WCA countries constructed a novel ‘competitive victim’ frame to define themselves and the problem. While this opening move was effective, it also featured tensions that were exploited by Northern actors who were threatened by the campaign. I argue that what followed was the introduction of a politically driven ‘counterframe’, which divided the problem into a ‘trade-related’ component and a ‘development-related’ component. It is important to understand why and how this distinction was constructed and monitored. By scrutinising the relationship between framing and institutional power, I suggest that the counterframe won over the original frame, leading to a re-positioning of the demanders and a re-calibration of their expectations.