out of money in their savings. Another reason is that a person experiences a shock, e.g. sudden unemployment or medical emergency and is forced to spend more than they earn. This person first dissaves from their personal savings and possibly later has to borrow money to finance their expenses. Third reason is that a person lacks judgment and lives above their means. These people finance their spendings from credit and are the most prone to shocks which may lead to personal bankruptcy. We can also assimilate a request for credit to early dissaving. Indeed, a household that has a consumer credit for the acquisition of a good commits to repay the loan and the interest on its future income, which reduces its future savings. Dissaving was reported as a typical response to deficits, for households with normal income and expenditure patterns during the depression of the 1930s. Although this phenomenon is very rare at the collective level, it is quite common at the individual level since, the purpose of savings is to one day be used for consumer purchases. With a phenomenon of dissaving at the collective level would be bad for the economy of a country since it is used for financing. Zero savings would practically prevent the financing of new investments and therefore potential growth. Dismissals at the collective level would have even more important consequences because the decrease in outstanding investments would lead to a drop in the quotations of financial securities (stocks and bonds) and would risk putting the banks and the systems of collecting savings into bankruptcy. following a liquidity crisis. Massive dissaving to consumption can also lead to inflation risks if the production of consumer goods is not sufficient to meet new demand. Saving and dissaving lifecycle The life-cycle approach of the saving and dissaving decisions Lowest tier people with the lowest income tent to save little while they are still working, which leads to a little dissavings as a consequence after their retirement. Even if they were somehow fortunate and could save some amount of money during their working/production life, they would still have few savings that they would consume in few months. (Low savings, low dissavings) Highest tier people with the highest income are considered to have high amount of savings, which in contract, they tend to dissave less. Such dissavings happen when they face health diseases, or when they have to