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Yayın The effect of academic inbreeding on scientific effectiveness(Springer, 2011-09) İnanç Tunçer, Özlem; Tunçer, OnurIn academia, the term "inbreeding'' refers to a situation wherein PhDs are employed in the very same institution that trained them during their doctoral studies. Academic inbreeding has a negative perception on the account that it damages both scientific effectiveness and productivity. In this article, the effect of inbreeding on scientific effectiveness is investigated through a case study. This problem is addressed by utilizing Hirsch index as a reliable metric of an academic's scientific productivity. Utilizing the dataset, constructed with academic performance indicators of individuals from the Mechanical and Aeronautical Engineering Departments, of the Turkish Technical Universities, we demonstrate that academic inbreeding has a negative impact on apparent scientific effectiveness through a negative binomial model. This model appears to be the most suitable one for the dataset which is a type of count data. We report chi-square statistics and likelihood ratio test for the parameter alpha. According to the chi-square statistics the model is significant as a whole. The incidence rate ratio for the variable "inbreeding'' is estimated to be 0.11 and this ratio tells that, holding all the other factors constant, for the inbred faculty, the h-index is about 89% lower when compared to the non-inbred faculty. Furthermore, there exists negative and statistically significant correlation with an individual's productivity and the percentage of inbred faculty members at the very same department. Excessive practice of inbreeding adversely affects the overall productivity. Decision makers are urged to limit this practice to a minimum in order to foster a vibrant research environment. Furthermore, it is also found that scientific productivity of an individual decreases towards the end of his scientific career.Yayın The importance of trade costs in deviations from the law-of-one-price: estimates based on the direction of trade(Wiley-Blackwell, 2012-07) İnanç Tunçer, Özlem; Zachariadis, MariosThe full impact of trade costs in segmenting product markets cannot be captured by considering aggregate prices or in the absence of information on the direction of trade. We address this problem by utilizing product-specific prices, cross-sectional productivity indices, and bilateral trade flows, allowing us to identify the probable source of any one product. We show that trade costs in the form of transportation and distribution costs are important in determining international price differences and segmenting international markets. Physical distance relative to the origin has a precisely estimated positive impact on international deviations from the Law-of-One-Price that is larger than estimates that do not account for the origin of each product. Based on our benchmark estimates, the price elasticity of distance was around 10% in 1990.Yayın Child domestic labour and mothers' employment in Turkey(Taylor and Francis, 2016-01-01) Susanlı, Zehra Bilgen; İnanç Tunçer, Özlem; Koloğlugil, Serhat; Koloğlugil, SerhatThis paper takes an initial step in studying the determinants of child domestic labour and its relationship with mothers' employment in Turkey. We focus on children that are responsible for performing the domestic chores in their households. Using household level data from Demographic and Health Survey (2003), we find that the probability of child domestic labour is greater if the oldest child in the household is female; and this is stronger in rural areas. We also find that the likelihood of child domestic labour decreases with parental education. Our findings also suggest that the unobservable factors that increase the probability that a mother works increases the probability of child domestic labour in urban areas, but the opposite is true for rural areas.
