دانلود مقاله ISI انگلیسی شماره 17513
عنوان فارسی مقاله

سیاست های تحقیق و توسعه، رشد درون زا و اثرات مقیاس

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
17513 2008 22 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
R&D policies, endogenous growth and scale effects
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : Journal of Economic Dynamics and Control, Volume 32, Issue 12, December 2008, Pages 3895–3916

کلمات کلیدی
اثرات مقیاس - نوآوری - حفاظت اجاره - تغییر فن آوری -
پیش نمایش مقاله
پیش نمایش مقاله سیاست های تحقیق و توسعه، رشد درون زا و اثرات مقیاس

چکیده انگلیسی

This paper constructs a scale-free endogenous growth model and studies the determinants of optimal R&D policy. The model combines two of the main approaches to removal of scale effects: the rent protection approach and the diminishing technological opportunities approach. The steady-state rate of innovation is a function of all of the model's parameters including the R&D subsidy/tax rate. Thus, growth is fully endogenous. Numerical simulations imply that it is optimal to tax R&D when innovations are of very small and very large magnitudes, and to subsidize R&D when innovations are of medium size. Under a wide range of empirically relevant calibrations, the subsidy rate turns out to be positive and fluctuates between 5% and 25%.

مقدمه انگلیسی

Endogenous growth theory came at a crossroads with the Jones critique in the mid 1990s. First generation endogenous growth models predicted that the long-run growth rate of an economy increases in the level of R&D inputs and thus larger economies should grow at higher rates.1 In two influential papers Jones, 1995a and Jones, 1995b refuted this scale effect prediction by examining the post-war time-series data from industrialized countries. In response, a second generation of endogenous growth models has emerged. This literature offers three main approaches to remove scale effects: (i) Diminishing Technological Opportunities (henceforth DTOs) put forward by Jones (1995b), Kortum (1997) and Segerstrom (1998); (ii) Rent Protection Activities (henceforth RPAs) proposed by Dinopoulos and Syropoulos (2007); (iii) Variety Expansion (henceforth VE) proposed by Aghion and Howitt (1998, Chapter 12), Dinopoulos and Thompson (1998), Howitt (1999), Peretto (1998) and Young (1998).2

نتیجه گیری انگلیسی

This paper has constructed a scale-free quality-ladders endogenous growth model that combines two of the main approaches to removal of scale effects: the RPA approach (Dinopoulos and Syropoulos, 2007) and the DTO approach (Segerstrom, 1998). I find that the steady-state equilibrium growth rate is a function of all of the model's parameters including the R&D subsidy rate. Hence, the model implies fully-endogenous growth. The presence of RPAs augments the effective replacement rate faced by the incumbent firms. The magnitude of this augmentation is positively related to innovation-deterring elasticity, which is endogenously determined. The optimal R&D policy exhibits an n-shaped relationship with respect to innovation size. When innovations are of very small and very large magnitudes, the optimal policy is a R&D tax, and for medium-size innovations, the optimal policy is a R&D subsidy. Numerical simulations imply that competitive markets typically underinvest in R&D and thus the optimal R&D policy is a subsidy. The magnitude of the R&D subsidy lies between 5% and 25% for plausible parameter values.

خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.