@thesis{thesis, author={Listyawan M. Wahyu}, title ={THE EFFECT OF CAPITAL STRUCTURE ON PROFITABILITY IN TRADE, SERVICE, AND INVESMENT COMPANIES LISTED ON IDX FOR THE 2017-2019 PERIOD}, year={2021}, url={http://repository.undar.ac.id/id/eprint/1954/}, abstract={This study aims to determine the effect of capital structure on profitability in trade, service and investment companies listed on the IDX for the 2017-2019 period. This study uses a positivism approach. The data used is a data panel in the form of audited and published financial reports from trade, service, and investment companies for the years 2017-2019. The population of this research is 177 companies in the trade, service, and investment sector listed on the IDX for the 2017-2019 period. The sampling technique uses purposive sampling to obtain a sample of 15 companies. The data analysis method used is descriptive statistical analysis, inferential statistical analysis, classical assumption test, multiple linear regression analysis, coefficient of determination, t test and hypothesis testing which were tested with the SPSS version 25.0 statistical application. The results of this study indicate that: (1) Leverage has a positive and significant effect on profitability, (2) Firm size has a positive and significant effect on profitability, and (3) Liquidity has a positive and significant effect on profitability. The amount of influence given by the independent variable on the dependent variable is 37.9%. While the remaining 62.1% is influenced by other variables outside of this study. Keywords : Profitability, Leverage, Firm Size, and Liquidity} }