Intertemporal versus interspatial comparison
From Devec
The following table examines intertemporal versus interspatial comparison in PPP calculation/index number theory. In particular, aspects of intertemporal comparisons have counterparts in interspatial comparisons, so the table catalogs these.
Comparison table
| Aspect | Intertemporal | Interspatial |
|---|---|---|
| How well the weights match the thing being compared[1]:19 | Up-to-dateness | Characteristicity |
| Tendency of Paasche quantity indices to be lower than Laspeyres indices[2]:75 | Gerschenkron effect | Own-weight effect |
| Ordering | Natural ordering by year (or other granularity of time periods) | No natural ordering (but some have devised orderings, e.g. an approach where structurally similar countries are compared to each other)[1]:32 |
| The thing against which other things are compared | Base year | Numéraire country |
| Symmetry in treatment of the base | Time-reversal test | Country reversal test (bilateral) or base-country invariance (multilateral)[2]:71–72 |
See also
External links
References
- ↑ 1.0 1.1 Drechsler, László (March 1973). "Weighting of index numbers in multilateral international comparisons". Review of income and wealth. Retrieved November 12, 2017.
- ↑ 2.0 2.1 Kravis, Irving B.; Heston, Alan; Summers, Robert (1982). "World Product and Income: International Comparisons of Real Gross Product (United Nations International Comparison Project Phase III)" (PDF). Johns Hopkins University Press. Retrieved November 5, 2017.
