Content Analysis of Investment Efficiency Measurement Methods (In Internal Research)

The researchers obtain deep insight into research by studying the literature on the subject. However, time and resources limit the scope of the study. Therefore, the current research aims to investigate and analyze the quantitative and qualitative content of methods of measuring investment efficiency. The statistical sample includes all articles published from the years 2009 to 2020 on the investment efficiency topic in the "www.sid.ir". The results showed that, IN 72 articles, 26 models have been modeled using 30 variables (in 121 repetitions). 55.6 percent (40 articles) have used models based on sales growth 15 articles (20.8 percent) have used QTOBIN. Also, 35 articles (48.61%) are without the use control variable. The dominant method is to use the univariate model of sales growth with a share of 32% (23 articles) of all articles. Because the results of data-based research are highly sensitive to variable selection and data quality, the results obtained from models based on sales growth and QTOBIN may be affected by factors such as inflation, the book value of assets, and weak market efficiency. Researchers should determine effective factors that are likely to lead to measurement error before choosing the variables of the research model.