Just to add fuel to the fire. AFAIK, there's no established measure of happiness, other than self-reported in surveys, and questionnaires. I should try asking i

Just to add fuel to the fire. AFAIK, there's no established measure of happiness, other than self-reported in surveys, and questionnaires. I should try asking in cogsci.stackexchange, if they have mapped serotonin levels in the brain to happiness in repeated experiments.