– We show that income distribution in the USA has a well-defined two-class structure. The majority of population (97–99%) belongs to the lower class characterized by the exponential Boltzmann-Gibbs (“thermal”) distribution. The upper class (1–3% of population) has a Pareto power-law (“superthermal”) distribution, whose parameters change in time with the rise and fall of stock market. We also di...

Josephson, Anna Leigh. M.S., Purdue University, December 2013. How Population Density Influences Agricultural Intensification and Productivity: Evidence from Ethiopia. Major Professors: Jacob Ricker-Gilbert, Raymond J.G.M. Florax. We use household-level panel data to estimate how population density impacts agricultural intensification and farm income in Ethiopia. We hypothesize that increases i...

Key Findings. (1) A larger proportion of the rural population than the urban population is uninsured and low income (living at or below 138% of the federal poverty line [FPL]) (9.9% as compared to 8.5%) and a larger proportion of the rural population than the urban population will be eligible for subsidized Health Insurance Marketplace (HIM) coverage due to income levels and current lack of ins...

– Personal income distribution in the USA has a well-defined two-class structure. The majority of population (97–99%) belongs to the lower class characterized by the exponential Boltzmann-Gibbs (“thermal”) distribution, whereas the upper class (1–3% of population) has a Pareto power-law (“superthermal”) distribution. By analyzing income data for 1983–2001, we show that the “thermal” part is sta...

To estimate the mid-point of an open-ended income category and to assess the impact of two equivalence scales on income-health associations. Data were obtained from the 2010 Brazilian Oral Health Survey (Pesquisa Nacional de Saúde Bucal--SBBrasil 2010). Income was converted from categorical to two continuous variables (per capita and equivalized) for each mid-point. The median mid-point was R$ ...

During the first three decades of the People’s Republic of China, income differences across social classes were compressed. Formal education was not an important determinant of personal income. In this study, there was no difference in income between white-collar and blue-collar families, although white-collar parents had more education than blue-collar parents. In urban China, where population...