After a discussion of cigarette smoking in the context of the Becker-Murphy (1988) model of rational addictive behavior, demand equations are derived accounting for the tolerance, reinforcement, and withdrawal characteristic of addictive consumption. These are contrasted to equations developed...

Are individuals effectively insured against idiosyncratic shocks to income or wealth by either formal or informal mechanisms? This paper shows that under perfect insurance, marginal utility should grow at the same rate for all consumers, and that the distribution of measured consumption growth...