We revisit optimal investment in energy-efficiency, presenting a decision framework built around the agent's wealth and … wealth dynamic. An investment rule in the form of a trigger is derived such that the agent invests the first time the energy …-carrier price crosses this threshold from below. Wealthier consumers, and those whose wealth grows faster, are seen to have less …

income structure on the basis of various measures. In describing the income situation, the household situation and wealth …The number of self-employed and entrepreneurs in Germany currently amounts to more than four million and is the result … entrepreneurship in Germany. Self-employed and entrepreneurs are first described in more detail on the basis of socio …