Abstract
By a "developed" economy, people roughly mean ones with a high, persistently-growing per-captia income which is not simply based on resource extraction (i.e., oil) or remittances or rentierism — an industrial (or, if there is such a thing, post-industrial) economy which makes most of its participants reasonably and increasingly prosperous. While there are of course differences among them --- the United States is not New Zealand, which is not Belgium, which is not Finland, which is not Japan --- they are all more similar to each other than they are to the vast variety of "undeveloped", "under-developed", or (most optimistically) "developing" economies across the world. (Some people refer to the developed countries as "the North" and the others as "the South"; this drives me up the wall, if only from looking at where China and Australia are on the map.) Economies in the first category tend to stay there; so, sadly, do countries in the second. Development economics is the sub-discipline of economics which attempts to study how economies which have not attained this happy condition can be made to do so, and the factors which hold others back.