We review the econometric literature on measuring the returns to R&D. The theoretical frameworks that have been used are outlined, followed by an extensive discussion of measurement and econometric issues that arise when estimating the models. We then provide a series of tables summarizing the major results that have been obtained and conclude with a presentation of R&D spillover returns measur...

We propose a Laplace stochastic frontier model as an alternative to the traditional model with normal errors. An interesting feature of the Laplace model is that the distribution of inefficiency conditional on the composed error is constant for positive values of the composed error, but varies for negative values. Therefore, it may be ideally suited for analyzing industries with many forms on o...

Efforts to raise US health-care productivity have proceeded slowly, potentially due the fragmentation of payment across insurers. Each insurer’s efforts improve care could influence how doctors practice for other insurers, leading unvalued externalities. We study a randomized letter intervention by Medicare curtail overuse antipsychotics. The letters did not mention private insurance but reduce...

Cet article vise à mettre en évidence les performances des secteurs agricoles dans principaux pays de l’UE (France, Allemagne, Italie, Pays-Bas, Espagne et Royaume-Uni). Basée sur la méthode comptes surplus, notre analyse performance inclut tous éléments du compte résultat, qui est l’une limites l’approche traditionnelle indices. De plus, cet...

How to determine how much and what produce? This is one of the great unknowns in economics. paper proposes study recipes offered by conventional economics, keynesian Economics, Austrian school questioning use assumptions mathematical tools. In addition, we will analyze concept dynamic efficiency, which provides a contribution debate. The importance analyzing various focuses on highlight that mi...

abstract o ur basic aim in this paper concerns the question that if overusing the information technology by service and manufacturing firms can increase the total productivity resulting from this kind of technology regarding the iran's economic structure and conditions. for this purpose, we primarily evaluate the productivity resulting from the rate of firms' use of it for the differe...