Why aren’t Asian Americans shown as a separate group when differences among whites, blacks and Hispanics are discussed in survey reports? It's a good question, so we put together a summary of some of the methodological and other issues on accurately polling U.S. Asians.

Just half of Americans (52%) say they trust all or most of their neighbors, while a similar share (48%) say they trust some or none of their neighbors. Neighborly trust also varies between demographic groups.

The number of UN peacekeeping forces around the world has peaked in recent months after falling off in the late 1990s, following a period of trial and error for UN interventions.

Perhaps no measure better captures the public’s sentiment toward the president than job approval. It dates back to the earliest days of public opinion polling, when George Gallup asked about Franklin D. Roosevelt starting in the 1930s.

From trust in government to views of climate change, here are some of Pew Research Center's most memorable findings of the year.

Beijing experienced more than 200 days of air pollution categorized as “unhealthy” or worse in 2014, including 21 days that were “hazardous.”

With so much new infrastructure, 62% of urban areas in China with populations over 100,000 have become less crowded -- even as most gained in total population.

The roughly 47% of the population today who were born under the one-child policy lived through a very different China than those born before.

Long years of service have been the norm for past speakers, most of whom had accumulated twice as much time in the House as today’s candidates before wielding the gavel.