The choice of capital structure has greatly contributed to the success of the firms in general and energy in particular. This study uses a sample data set of 250 energy firms over the period 2010-2019, and by using generalized least square (GLS) method to perform a survey. The main factors in this study include profitability, firm age, state shareholding and depreciation tax shield, etc. The study found that except firm growth, all factors including firm performance, age of firm, size of firm, asset structure, short-term solvency, and depreciation have significantly affected firm’s capital structure choice in the case of energy industry in a developing country. Furthermore, a positive effect was also found for size of firm and asset structure while a negative effect was detected for other factors such as firm performance, asset structure, firm age, short-term solvency, and depreciation. Through this research, we also conclude that the theory of pecking order, and the theory of representative cost are known as the basis for financial managers to build sound capital structures for businesses.

The paper aims to examine the impact of human capital, capital structure choice and firm profitability of 48,673 Vietnamese construction firms in 2016. Measuring firm profitability by return on assets (ROA) or return on equity (ROE), the results demonstrated that using more debt in capital structure would positively increase the performance of the firm but this positive effect was increasingly declining. Moreover, evidence showed that human capital had a positive impact on the result of business activities. A larger size of a firm could positively boost firm performance. Regarding firm location, a firm locating in the metropolitan of Ho Chi Minh City had a higher level of performance than a firm locating in the metropolitan of Hanoi capital. Finally, operating status of the firm as well as the establishment of industrial park had insignificant impacts on firm profitability.