It is perceived by many that basic source of knowledge is either formal or informal education, and it is often perceived that the more someone advances in his/her levels of education the more knowledge he/she possesses. If I assume that all of these perceptions are true, then how can I measure the financial/monetary values of knowledge or education? Albeit I understand one of the possible answers would sound like this- "delve into their income after education", but does one's income after education really measures the true monetary value of the levels of that person's education? If yes, then what about the 'other relevant things' beside education which are also evaluated by a potential employer before offering a Job? Aren't those 'other relevant things' have something extra which make a candidate extraordinary among the others to receive that offer? If again the answer is a big 'yes', then how can I evaluate the monetary value of the education only by keeping those 'extra things' aside? Is there any solid answer to this question?