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Sweetness and Power – Public Policies and the ‘Biofuels Frenzy’ In the last decade, there has been a huge policy‐led expansion in biofuels production and consumption. This paper presents some of the findings of a funded research project which has sought to identify the drivers of biofuels policies over this period. It focuses on the EU, US and Brazil which, together, represent about 90 per cent of global biofuels markets. Biofuels policies have three key drivers: as a partial substitute for fossil fuels, to lower greenhouse gas emissions; as a way of improving energy security, by diversifying away from fossil fuels and from the limited number of countries with fossil‐fuel reserves; and as a means of promoting rural development, given the opportunities offered by the production of biofuel feedstocks and their processing into biofuels. One particular challenge for both the EU and US has been to create and sustain a broad coalition of stakeholder interests in support of biofuels and biofuel policies. Both have sought to promote ‘conventional’ biofuels now, whilst trying to aid the development of ‘advanced’ biofuels industries that will address problems with existing technologies. The continued failure to deliver significant quantities of advanced biofuels raises questions for biofuels policymakers going forward, not least dealing with the downsides of conventional biofuels that, so far, have not been mitigated by a successful transition to advanced biofuels.  相似文献   

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By now new modern rice varieties (MVs) with multiple pest and disease resistance have completely replaced early MVs, such as IR5 and IR8, except in a few areas of Asia. This study attempts to identify the changing impacts of ‘first-generation’ and ‘second-generation’ MVs on productivity in rice farming by estimating the yield function, while correcting selectivity bias arising from the choice of varieties. For this purpose, we used farm-level survey data collected for eleven cropping seasons in Central Luzon in the Philippines from 1966 to 1990. We found that while the yield advantage of first-generation MVs over traditional varieties was limited, the yield-increasing effect of second-generation MVs over first-generation MVs was highly significant. In particular, the adoption of improved MVs significantly contributed to yield growth under the irrigated condition and during the dry season. Thus, we conclude that the Green Revolution would not have been revolutionary without the development and the diffusion of second-generation MVs with multiple pest and disease resistance.  相似文献   

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English agricultural practice changed dramatically in the late 18th and early 19th centuries as enclosure, the dominance of commercial short‐term leases for tenant farmers, and the proletarianization of the agricultural labour force completed what has been called an agricultural revolution. A less often noted aspect of this change was what was called “a war on cottages” and cottage gardens. The Board of Agriculture and Arthur Young were important cheerleaders for this process. Yet many of the most prominent members of the Board of Agriculture made impassioned appeals for the provision of land for English cottagers as a way to reduce poverty and stressed that cottagers produced remarkable returns from their small farms. Arthur Young became the most vocal proponent of land for cottagers. This article suggests that their appeals for land for cottagers were limited by both farmers' desire for easily controlled labour and misplaced concerns about the supposed inevitability of the poverty inherent in very small farms.  相似文献   

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Both tractors and milking machines were available to British farmers from the early 19OO's, but the mechanisation of field work and of dairy farming was not general until the 1950's. This paper discusses the technical difficulties of early forms of farm machinery, and the reorganisation of farm work which was required to use the machinery efficiently. Tractors were at first adopted for heavy work, thus easing the pressure on, and increasing the efficiency of, the horses. It was not until after the second world war that tractors and their implements became sufficiently reliable and versatile to supplant horses in all farm operations and to change an important constraint upon the structure of farms and the methods of working them.  相似文献   

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Agrarian structures based on small peasant property can have two opposite kinds of impact on urban wages. In the first type, stable smallholder farming bringing high returns puts upward pressure on wages. In the second type, smallholder farming that does not bring sufficient returns leads to semi‐proletarianization in which workers' access to rural sources of income functions as wage subsidy and puts downward pressure on wages. This paper argues that the situation in Turkey between 1950 and 1980 fits the second type. By pointing out the factors that changed the attitude of the migrant labourers towards class struggle from relative passivity to increasing militancy, it suggests that instead of the rural ties of the emerging working class, the main reason behind the dramatic rise in urban wages in Turkey in the 1960s and 1970s was the working‐class struggle throughout the period.  相似文献   

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This paper investigates the factors responsible for a drastic decline in the growth rate of labor productivity of the agricultural sector for the 1956–90 period. This investigation is carried out by a newly devised procedure which decomposes the growth rate of labor productivity into (1) the total substitution effect which consists of the effects due to factor price changes and biased technological change, and (2) the TFP effect composed of the effects due to scale economies and technological progress. Based on empirical estimation of the translog cost function, it was found that the total substitution effect contributed to the growth of labor productivity much more than the TFP effect did for the period under question.  相似文献   

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