This article analyzes the determinants of farm income among hillside farmers participating in natural resource management projects in El Salvador and Honduras. The farm income function was evaluated using a system of equations in which income is determined simultaneously by the farmer's decision to adopt soil conservation technologies and by the level of diversification (number of agricultural activities) on the farm. The database used comes from surveys administered to 678 beneficiaries of these projects during 2002. The econometric results suggest that all the variables related directly to land use (i.e., output diversification, soil conservation practices and structures, and the adoption of forestry systems) have a positive and statistically significant association with farm income. Also, farmers who own land enjoy higher farm incomes than those who do not. The results indicate that when investing in natural resource management projects, governments and multilateral development agencies should pay close attention to output diversification, land tenure, and human capital formation as effective instruments in increasing farm income. Copyright 2006 International Association of Agricultural Economists.

The main objective of this paper is to determine the productivity growth in the Chilean Agricultural sector during the 1961-1996 period. Total Factor Productivity (TFP) was calculated using the Törnqvist index, which is a discrete approximation to the Divisia index. The data used to estimate these indexes are prices and quantities for 51 crops, and for four inputs —labor, land, capital and intermediate factors. The rate of annual growth for the period 1961-96 was 2,69% and –0,09%, for products and inputs, respectively. Therefore, the TFP grew at an average annual rate of 2,78%. Given a significant annual variability in TFP growth, an analysis was carried out for seven sub-periods corresponding to different political regimes. TFP grew at an annual average of 1,83% with Alessandri (1961-64), 3,12% under the period of Frei Montalva (1965-70), 1,52% during the Allende years (1971-73), 6,11% during the first part of the Pinochet regime and –0,28% in the second period of Pinochet (1981-89), 3,12% during Aylwin (1990-93) and 5,28% under Frei Ruiz-Tagle (1994-96). The results suggest that the land reform program implemented in the 1960s did not have a negative effect on TFP growth, as has been previously argued by some authors.

This paper reports on the use of a growth accounting approach to calculate and decompose cost efficiency indices into technical change, regional competitive advantage stemming from spatial effects, and economies of size. Dairy farm data for Connecticut, Maine, Vermont, Michigan, New York and Pennsylvania for the years 1968 are utilized in the analysis. The results show that technological change yielded a 1.8% average annual rate of cost reduction over the period studied. In addition, medium and large farms were, on average, 12% to 20% more efficient than small farms. Pennsylvania had a distinct competitive advantage (13.8%), while Maine exhibited a clear competitive disadvantage (-18.2%) in producing milk relative to New York. Ce papier s'inspire d'une approche de compte de croissance pour évaluer et traduire les index de coût d'efficacité en changement technique et avantage compétitif régional découlant d'une part des effets spaciaux, d'autre part des économies d'échelle. Des données de fermes laitières de Connecticut, Maine, Vermont, Michigan, New York et Pennsylvania pour les années 1968et 1988 ont été utilisées au cours de cette analyse. Les résultats démontrent que le progres technologique a contribué en moyenne à un taux annuel de diminution des coûts d'environ 1.8% durant la période étudiée. En outre, les grandes et moyennes exploitations ont été de 12% à 20% plus performantes que les petites exploitations. Pennsylvania a enregistré un gain de compétitivité (13.8%) dans la production de lait alors que Maine affichait une nette baisse (-18.2%) par rapport à New York.

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