A comparison on accounting variables in income smoother and non-income smoother firms by using Moses income smoothing behavior index

This research intends to compare accounting variables in income smoother and non-income smoother firms in Tehran Stock Exchange market. In this regard, the statistical typical companies were firstly separated to two income smoother and nonincome smoother firms and then the accounting variables were compared subject to above different groups. Six features including company’s size, personnel’s costs, debt ratio, industry, management bonus and tax as independent variables and income smoothing behavior as dependent variable were examined in the research. This research has been carried out based on annual observations since 1384 to 1389 (2006-2011). Research findings show that company’s size, personnel’s costs, management bonus and tax are not effective factors on income smoothing behavior of samples and also there is no meaningful difference among income smoother and non-income smoother firms in these stated variables. Instead, debt ratio and industry variables are effective factors on income smoothing behavior. It reveals that there is a meaningful difference between in income smoother and non-income smoother firms in view point of debt ratio. In addition, the income smoothing behavior of companies differs from each other.