Using the 1992 Bulgarian household budget survey, the authors analyze the distribution of income and of the income tax … burden by income and expenditure class and by rural-urban sector. They find: 1) Low income inequality (although that is … changing rapidly). 2) A progressive income tax system. The poor (the lowest two-income decile) pay only 1.4 percent of their …

Is there a"middle income trap"? Theory suggests that the determinants of growth at low and high income levels may be … different. If countries struggle to transition from growth strategies that are effective at low income levels to growth … strategies that are effective at high income levels, they may stagnate at some middle income level; this phenomenon can be …