The importance of using technical progress factors in agriculture varies from one country to another and the influences of these factors on yields and agricultural production are essential. Thus, in this paper we considered necessary and appropriate to achieve the dynamic analysis of the main factors of technical progress in agriculture referring to agricultural technical endowment, fertilizers...

Recent widening of the wage gap between skilled and unskilled workers has been attributed mainly to skill-biased-technical-change and to trade liberalization. This paper examines the effects of the two in a unified model, in which trade and technology adoption are endogenous. The paper has two main results. First, technical progress increases the wage gap in developed and in less developed coun...

Better understanding of the role of learning in technical progress is important for the development of innovation theory and technology policy. This paper presents a comparative analysis of the effect of learning and technical change in electricity generation technologies. We use simultaneous two-factor learning and diffusion models to estimate the effect of learning by doing and learning by re...