Common market health measures such as GDP and GNP have been used as a measure of successful policy. Some economists argue that although on average richer nations tend to be happier than poorer nations, beyond an average GDP/capita of about $15,000 a year, studies indicate the average income in a nation makes little difference to the average happiness of the people in the nation.[40][41] It has been argued that happiness measures could be used not as a replacement for more traditional measures, but as a supplement.[42] | Common market health measures such as GDP and GNP have been used as a measure of successful policy. Some economists argue that although on average richer nations tend to be happier than poorer nations, beyond an average GDP/capita of about $15,000 a year, studies indicate the average income in a nation makes little difference to the average happiness of the people in the nation.[40][41] It has been argued that happiness measures could be used not as a replacement for more traditional measures, but as a supplement.[42] |