The main goal of this article is an applied investigation of one of the types of biases caused by overconfidence, under the heading of bias in expected relative wage (or individual overplacement) and its relationship with time preferences (in the form of a proxy of people's patience) based on the Friehe & Pannenberg (2020) method. The data gathering tool of this investigation has been a two-stage questionnaire. 204 staff and faculty members of Ilam university completed the questions related to the questionnaire in two stages. Based on the ordinary least squares and semi-parametric model, the relationship between bias in wage and time preferences was examined in four stages. The results of research models in four stages showed that there is a negative and significant correlation between bias in expected relative wage (or bias in the distribution of the relative wage of people of the same age-peers) and time preferences. This means that people who are more patient, will have less bias (overplacement) on average. Examining the impact of current relative wage on bias showed that there is a positive and significant correlation between bias and current relative wage; This means that the current relative wage of individuals is not effective in reducing bias, and the higher the individual's current relative wage, the individual's bias will be greater. Also, the results showed that there is a positive and significant correlation between bias and extraversion, a negative and significant correlation between bias and neuroticism and a negative and significant correlation between bias and agreeableness.

Labor is one of the most important factors of agricultural production. Female and male labor have special oles in different processes of production. Therefore efficient use labor factor has special importance. One of the most appropriate, products which are important for this study is sugar beet. Its importance is due to the intensity of labor, presence of labor in different processes of production and its strategic role. Seven areas were selected in this study that have subjected under sugar factory of Bardsir. One hundred and fifty questionnaires were completed in this study. Production function and profit function were estimated for driving labor demand function. Factors that affects on labor supply and demand were evaluated. Analysis of wage determination criteria’s was some of the important targets in this study. This criterion’s included market equilibrium wage, value marginal product of labor and minimum wage. The results of this research were as follows: 1-Elasticity of labor demand was minimum in groups who have less than two hectares; 2- Current wages of labor were less than value marginal product of labor, equilibrium wages and poverty line in this area. Therefore, organizing of farmers association, improving work law and conversion industries were proposed in agricultural sector.