The concept of marginal or marginal (marginal) is neoclassical school of economics brought into the 20th century It is the change in a given quantity. The marginal cost of primary education is the change in total costs for students to spend learning a unit of knowledge. Marginal benefit is the change in total benefits to learners must learn a unit that knowledge. The purpose of the analysis of the marginal cost - the benefits of education is determined optimal choice (stops) when the investment in human capital. In Figure 2, if the school stops at point C, whereas the marginal cost MC (of the direct cost) at point C is less than the marginal benefit MR (including economic benefits and utility) at point A should This option is not optimal. According to the principles of economics, the optimal choice when only MR with MC at point B. O'Donoghue (1999) suggests that those with higher incomes have higher individual marginal benefit more. The reason is the economic motor carriers will continue to learn to increase labor productivity, increase revenue, and the marginal benefit from increased attendance (see Becker, 1964; Mincer 1974; Strober, 1990). This is an important assumption in accessing investment model of human capital. But in reality, many people leave school early while others continue to invest in education. So, have to leave school early is dull and continue to go to school is intelligent?
model of human capital investment
Figure 3 shows that A and B are the points that individuals make optimal choices for investing human capital. At this point, the marginal benefit equals marginal cost. Depending on the calculation of the cost - benefit analysis, who stopped school at point A with the E1 level and go to work while others stop at point B school with the E2 level if they see that at point B, they become competitive on the labor market. Human nature is the desire of self-interest and infinite, should, in principle, individuals are to achieve optimum levels of education (Mincer, 1974). However, if we assume that individuals attend for economic reasons, there are two factors that should bind individuals choose different stops leading to their education differently. The constraints that are inherent ability of the learner (Spence, 1973; Weiss, 1995; Ashenfelter and Rouse, 1998; Arcidiaconno, Bayer, and Hizmo, 2010) and discount rates or lending rates (in terms the financial education field works perfectly) (see Woodhall, 2004; Checchi, 2005). This difference resulted in two people going to school with different levels of education and thus their compensation wages on the labor market are also different.
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