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The determinants of capital structure have been a widely discussed subject in the finance literature. The purpose of this paper is to determine whether firm-specific capital structure determinants in the emerging market of Turkey support the capital structure theories which were developed to explain the company structure in developed economies. Specifically, we try to answer the following questions: Firstly, are determinants of capital structure correlated with the leverage that has been declared in the developed economies setting correlated in Turkey as emerging market as well? And secondly are the modern capital structure theories (e.g. trade-off and pecking-order hypothesis) valid in explaining capital structure of the Turkish companies? In this paper, we apply econometric techniques and panel data analyses. We empirically examine the capital structure of 242 companies of different sectors that are traded in Istanbul Stock Exchange (ISE). In the period of 2000-2009 depending on the findings of the panel data analysis, we can conclude that Turkish companies do not have debt ratio targets. We suggest that Turkish companies follow a hierarchical company structure. More specifically, we claim that trade-off theory is less successful than the pecking order hypothesis in explaining the capital structure of the Turkish companies. Therefore, Turkish companies are following pecking-order hypothesis in their debt behaviors.

In financial investment decisions to be made by individual investors, it is highly important that they should be aware of the possibility of facing with psychological biases by knowing their own personality traits and should consider their own financial risk tolerances. In this study, the relation between personal traits, psychological biases and financial risk tolerance of inverstors were tested through a questionnaire. Sample of the study were selected among individual inverstor who live in İstanbul and operate in financial markets. The hypotheses made within the scope of the study were tested by chi-square analysis and logistic regression analysis. As a result of the hypotheses testing, it was concluded that there was a significant relation between the personality traits of investors and the psychological biases they faced and that the personality traits of investors affected their financial risk tolerances.

In this study, it is aimed to show the interaction between financial performance and corporate entrepreneurship which can be identified as whole activities of new product, process, market, technology, strategy and improving management technique. In this respect, alternative two models to explain the interaction which is mentioned above were tested in an empirical research on 140 industrial manufacturing firms which are publicly trading in Istanbul Stock Exchange (ISE). Developed models and hypothesis are analysed by means of the Structural Equation Modelling (SEM) using LISREL. According to research findings it was determined that original dimensions of corporate entrepreneurship which is compound of innovation, risk taking and proactiveness has positive relation and interaction with financial performances of the firms. In addition; in the latest development in the related literature, autonomy and competitive aggressiveness variables which was added to the original dimension later on, did not show any relation with financial performances of firms.