Explaining the effective variables in measuring intellectual capital and providing the optimal model

The purpose of this research is to investigate and explain the effective variables in measuring intellectual capital and to provide an optimal model. This research is developmental in terms of its purpose, analytical-correlational in terms of the type of method, qualitative in terms of the method of collecting data, and with a meta-composite approach in terms of the method of conducting the research. The statistical population of the research includes all studies and researches done in the past in the field of intellectual capital. In two parts in this research; descriptive and inferential meta-analysis, the analysis of the intellectual capital of the researches published in the period of 1366 to 1399, extracted from the Irandoc database, in the number of 51 studies (102 variables - including repeated variables, finally 53 variables) was analyzed. Based on the descriptive meta-analysis, the classification of intellectual capital research were categorized into three categories of organizational focus, the focus of intellectual capital accounting literature, and the research methods used in the research. Also, based on the criteria of concentration of accounting literature, intellectual capital research was divided into five categories: audit, accountability and governance, management control/strategy, performance measurement, and others (including the public). Inferential meta-analysis was performed using stata software. Based on the results of inferential meta-analysis, the relationship between intellectual capital components and financial performance components was examined. The results showed that based on the pattern of random effects, the average effect size extracted from the research is equal to 0.269.