The aim of this study is to test the influence of tax avoidance towards the cost of debt moderated by institutional ownership. In this research, tax avoidance measured by proxy of Book Tax Different (BTD) and Cash Effective Tax Rate (CETR). The population in this research is manufacturing firms that listed on Indonesia Stock Exchange (IDX) with 2015-2017 time periods. The amount of sample before outlier is 198 datas collected with purposive sampling method, then the amount of sample after outlier is 187 datas for first model and 186 datas for second model. Cross section data is used in this research. Multiple linear regression, determination coefficients, and partial test (t-test) is used with some help of programming data using SPSS (Statistical Product and Service Solution) 23th version to analize in this research. The result of this study indicate tax avoidance has not significant influence towards the cost of debt, and institutional ownership can’t moderate the relationship between tax avoidance and the cost of debt.

This research is using quantitative study aimed to see whether there are influence of dividend policy, leverage and profitability to firm value. The population used in this study is a manufacturer firm listed on the Indonesia Stock Exchange (BEI) in the period 2014-2017. By using purposive sampling method, it is obtained as many as 53 firm as the study sample. The method of analysis used in this study is multiple linier regression with a significant level of 0.05 (5%). In this research also include the classical assumption that normality test, multicollinearity test, autocorrelation test, and heteroscedasticity test. The results of these test indicate that (1) there is significant influence of  dividend policy to firm value. (2) there is significant influence of leverage to firm value and (3) there is no significant influence of profitability to firm value. Keywords : dividend policy, leverage, profitability, firm value.