Characterizations of Special Curves

In this study, the new characterizations of special curves are investigated without using the curvatures of these special curves: general helices, slant helices, Bertrand curves, Mannheim curves. The curvatures are given by the help of the norms of the derivatives of Frenet vectors.Comment: 7 pages with 1 figur

International Capital Mobility and Factor Reallocation in a Multisector Economy

This paper examines the effects of international capital flows in a small open econ omy utilizing a dynamic general equilibrium framework based on a three-sector Ramsey growth model. In order to analyze the impact of international capital mobility on production, consumption and allocation of resources across three sectors ,two different economic environments are modelled. The first model represents an open economy with capital mobility (a more comprehensive environment),and the second model introduces a closed economy with no capital mobility. Numerical applications of the models use data from the Turkish economy for the year 2002. The numerical results demonstrate that the presence of capital mobility, despite being limited by a borrowing constraint, reverses the impact of economic growth on production and resource allocation. The results also show that while production in the closed economy model simply adjusts to domestic demand, that of the open economy model is not constrained by it. Results further point that although there is positive growth in income and output in both environments, income growth in the capital mobility environment falls short of that in the no capital mobility environment. This result can be attributed to the relatively slower accumulation of capi tal in the former, which may be compensated by a positive rate of technological progress to accompany international capital flows.International Capital Flows,Human Capital, Multisector economy,Borrowing Constraint

Price Setting Behavior in Turkish Industries: Evidence From Survey Data

This study investigates the price setting behavior of Turkish industries based on the results of a survey that was conducted by the Central Bank of the Republic of Turkey. The results show that under normal conditions, the majority of the firms follow time-dependent pricing rule but when significant events occur substantial fraction of them alter their behavior to state dependent reviewing. The median Turkish firm reviews its prices every month, but changes its prices four times a year. Price reviews and changes are affected by: the market share, price discrimination, customer type, firm size and the existence of regulated prices.price-setting, price-rigidity, survey

Does Internal Migration Lead to Faster Regional Convergence in Turkey? An Empirical Investigation

In this study, we examine whether internal migration in the last 30 years in Turkey has had any effect on the speed of convergence across Turkish provinces. According to our results, contrary to the predictions of the standard neoclassical theory, for 1975-2000,internal migration is not conducive to faster convergence across provinces in Turkey. One probable reason is that marginal returns to capital in most net outmigration provinces and regions are relatively lower than those in the net in-migration provinces and regions in Turkey. Accordingly, the incentives to invest in capital in net-out migration regions may well be less than those in the net in-migration regions.Faced with lower investment in gross capital formation, and thus lower economic growth, net out-migration provinces and regions may not benefit from out-migration in terms of convergence in per capita income.

Regional convergence and the causal impact of migration on regional growth rates

The standard growth theory predicts that allowing for labor mobility across regions would increase the speed of convergence in per capita income levels and that migration has a negative causal impact on regional growth rates. Although the empirical literature has uncovered some evidence for the former implication, the latter has not been verified empirically. This paper provides empirical evidence for the negative causal impact of migration on provincial growth rates in a developing country with a high level of internal migration that is characterized by unskilled labor exiting rural areas for urban centers. We utilize instrumental variables estimation method with an instrument unique to the country examined and also control for provincial fixed effects.Regional convergence; Regional growth; Internal migration; Fixed effects; IV estimation

Regional Convergence and The Causal Impact of Migration on Regional Growth Rates

The standard growth theory predicts that allowing for labor mobility across regions would increase the speed of convergence in per capita income levels and that migration has a negative causal impact on regional growth rates. Although the empirical literature has uncovered some evidence for the former implication, the latter has not been verified empirically. This paper provides empirical evidence for the negative causal impact of migration on provincial growth rates in a developing country with a high level of internal migration that is characterized by unskilled labor exiting rural areas for urban centers. We utilize instrumental variables estimation method with an instrument unique to the country examined and also control for provincial fixed effects.Regional convergence; Regional growth; Internal migration; Fixed effects; IV estimation

Does Internal Migration Lead to Faster Regional Convergence in Turkey? an Empirical Investigation

In this study, using econometric methods, we examine whether internal migration in the last 30 years in Turkey has had any effect on the speed of convergence across Turkish provinces. According to standard neoclassical theory, migration across regions is conducive to faster convergence in income per capita: migration occurs from regions with low per capita income towards regions with higher per capita income, thus per capita income in in-migration regions would fall while that in out-migration regions would tend to rise, holding all else constant. In this study, we first test for absolute convergence across 67 Turkish provinces for 1975-2000 using non-linear least squares method. We find that there occurs no absolute convergence, meaning that provinces with initial-low-income per capita had no tendency to grow at a faster rate than provinces with initial-higher-income per capita. This result may be due to the fact that there are significant structural differences among provinces. To test this likelihood, regional dummies and sectoral shares in gross provincial product variables (agriculture, industry and services) are added to the convergence regressions. As expected, when we control for regional and sectoral differences across provinces, convergence across provinces occurs. Lastly, in order to assess the contribution of migration to convergence, we include net migration rates as explanatory variables to convergence regressions. We use the Instrumental Variables method in order to control for endogeneity between growth in per capita income and migration. According to our preliminary results, contrary to the predictions of the standard neoclassical theory, for 1975-2000, internal migration is not conducive to faster per capita income convergence across provinces in Turkey. One probable reason is that the marginal returns to capital in most net out-migration provinces and regions are relatively lower than those in the net in-migration provinces and regions in Turkey. Accordingly, the incentives to invest in capital in net-out migration regions may well be less than those in the net in-migration regions. Faced with lower investment in gross capital formation, and thus lower economic growth, net out-migration provinces and regions may not benefit from out-migration in terms of convergence in per capita income.