For example it is almost impossible to tip the maid in your room, if you leave money on the pillow, she will fold it neatly and put it on your desk…most Thais are very honest.
The measure is difficult to compute, as a US dollar value has to be assigned to all goods and services in the country regardless of whether these goods and services have a direct equivalent in the United States for example, the value of an ox-cart or non-US military equipment ; as a result, PPP estimates for some countries are based on a small and sometimes different set of goods and services.
It excludes purchases of dwellings but includes imputed rent for owner-occupied dwellings.