It is common for social scientists to use formal quantitative methods to compare ecological units such as towns, schools, or nations. In many cases, the size of these units in terms of the number of individuals subsumed in each differs substantially. When the variables in question are counts, there is generally some attempt to neutralize…

The past decade has seen declining numbers of 0-4 year-olds while the number of 5-14 year-olds has continued to rise. During this period, most countries increased their financial investment in primary and lower secondary education, improving student-teacher ratios. However, the distribution of teachers remains uneven, with urban areas often facing…