Explore a lecture on the distribution of long-term profits in US-listed firms from 2000-2019. Delve into the complex dynamics of socio-economic variables and discover how the normal-log-normal (NLN) mixture distribution fits the data better than t and log-normal distributions. Examine parameter estimates and their implications for 'superstar' effects in the economy. Consider future research directions on the origins of the NLN distribution in economic profit data.