San Diego — The exodus of Californians forecast in recent news headlines isn’t likely to happen soon, UC San Diego researchers reported in a survey released Wednesday. The UC San Diego survey queried more than 3,000 Californians, including 295 who completed the questions in Spanish. It found that nearly two-thirds of residents still believe in the “California Dream” of opportunity and prosperity. “Over the winter there was an increasing narrative we kept seeing in the news media about people leaving California — focused primarily on wealthier Californians, the Elon Musks of the world,” said Thad Kousser, professor of political science at the University of California San Diego and co-author of the study. “But what we were seeing was individual stories. We wanted to look at whether there was data behind those stories.”