The report was prepared by the Sustainable Development Solutions Network, an international panel of social scientists that includes economists, psychologists and public health experts convened by the United Nations secretary general, Ban Ki-moon.

Though the findings do not represent the formal views of the United Nations, the network is closely tied to the Sustainable Development Goals, which the organization adopted in September, aiming, among other things, to end poverty and hunger by 2030, while saving the planet from the most destructive effects of climate change.

The field of happiness research has grown in recent years, but there is significant disagreement about how to measure happiness. Some scholars find people’s subjective assessments of their well-being to be unreliable, and they prefer objective indicators like economic and health data. The scholars behind the World Happiness Report said they tried to take both types of data into account.

In a chapter of the report on the distribution of happiness around the world, three economists — John F. Helliwell, of the University of British Columbia; Haifang Huang of the University of Alberta; and Shun Wang of the Korea Development Institute — argued against a widely held view that changes in people’s assessments of their lives are largely transitory. Under this view, people have a baseline level of contentment and rapidly adapt to changing circumstances.

The three economists noted research showing that people’s evaluations of their lives “differ significantly and systematically among countries”; that within countries, subgroups differ widely in their levels of happiness; that unemployment and major disabilities have lasting influences on well-being; and that the happiness of migrants approximates that of their new country, instead of their country of origin.

The three economists noted that crises can prompt vastly different responses based on the underlying social fabric. In Greece, where the economy began to plummet in 2007, setting off a crisis in the eurozone that has resulted in three financial bailouts, widespread corruption and mistrust were associated with the diminishing sense of happiness over the past decade.