According to a survey done by Bloomberg among 51 countries including the euro area, Thailand and Switzerland are "the happiest" countries. Inflation and unemployment rate, the two factors that determine whether a country has a developed economy or not, are the lowest on the scale for Thailand and Switzerland.
The unemployment rate is only 3.3% and there is 0.9 percent deflation in Switzerland. Not so wealthy Thailand also recorded very low unemployment rate, below 1%.