While a mind-altering-substance consumption alleviates current level of depression, it facilitates future depression. Our analysis incorporates this trade off and shows that the stationary state of a consistently overly ambitious sophisticated substance user is improved by impatience, and that...

A no-arbitrage rule of consumption and a golden rule of capital accumulation are derived under the assumptions that the satisfaction from consumption is spoiled by environmental degradation caused by industrialisation but moderated by cleaning up and greening operations.

An expected lifetime-utility maximizing diet of junk and health food is analyzed. The stationary junk-food consumption level is equal to the ratio of the recovery capacity of a perfectly healthy person to the sensitivity of her health to junk food. The greater the difference between the relative...

This paper develops a lean-against-the-wind rule for setting low-skill immigration quota. The construction of this rule takes into account the factors governing the supply of and demand for low-skill immigrants, illegal immigration, border enforcement and the host-country's level of unemployment.

Sensitivity of sincere social communication to economic status disparity is incorporated into the construction of sincere social-capital index. The consideration of this index leads to the depiction of the happiness-wealth relationship as an inverted U-shaped curve that peaks at a larger than...