نتایج جستجو برای: econometric model
تعداد نتایج: 2109104 فیلتر نتایج به سال:
“The preparation of essentially descriptive accounts of immigration into particular countries, together with indications of the supposed effects produced by this immigration, entails little difficulty. Much difficulty, however, besets attempts to isolate and evaluate with precision specific effects, economic and otherwise, produced in countries of immigration by foreign-born individuals who cam...
This study examines three alternative models of correcting for heteroskedasticity in wheat yield: the time trend variance, the GARCH, and an econometric model that includes the potential sources of heteroskedasticity. Nonnested test results suggest that modeling the sources of heteroskedasticity is the preferred procedure. Including potential sources of heteroskedasticity as explanatory variabl...
The purpose of this paper is to try and identify some of the factors behind the comparatively poor R&D performance of the UK in the 1990s, a decade when R&D intensity in the business sector declined consistently. We estimate an econometric model of R&D expenditure using a panel of UK manufacturing industries. Our results highlight the importance of industry characteristics such as sales and pro...
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...
More than thirty years ago Milton Friedman proposed a `plucking' model of business °uctuations in which output cannot exceed a ceiling level, but will, from time to time, be plucked downward by recession. The model implied that business °uctuations are asymmetric, that recessions have only a temporary e®ect on output, and that recessions are duration dependent while expansions are not. Subseque...
I their article, “Structural Modeling in Marketing: Review and Assessment,” Chintagunta, Erdem, Rossi, and Wedel (2006) provide a comprehensive survey of the contributions to the empirical marketing literature made by researchers using structural econometric modeling. More importantly, their review poses the question of whether structural methods should become more prominent in marketing resear...
This paper studies the saving behavior of rural households in Vietnam from two aspects: volume of savings and methods of saving. Two econometric models are conducted, the first one is a panel data model, used to examine the determinants of household saving; and the second one is a multinomial logit model used to investigate how a household chooses the way to save. Both models are based on the l...
The borders of EU are open for the movement of resources but still there can be some strong negative effects of international borders on productivity and knowledge spillovers compared to the internal regional borders. These negative effect could be due to language barriers, cultural differences, local rules and regulation, legal issues, property rights etc. These effects of international border...
This paper reconsiders the developments of model evaluation in macroeconometrics over the last forty years. Our analysis starts from the failure of Cowles foundation models. The different diagnosis of this failure are then analyzed to classify them in two groups: explanations related to problems in the theoretical models that lead to problems in the identification of the relevant econometric mo...
Article history: Received 29 July 2010 Received in revised form 2 May 2012 Accepted 4 July 2012 Available online xxxx A number of socio-economic factors influence broadband diffusion and are assumed to be responsible for the different levels of adoption among countries. Most of the approaches met in literature do not take into account the different stages of the diffusion process and they are p...
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