Shiller won the Nobel prize for economics in October 2013 for his research that has improved the forecasting of long-term asset prices and helped the emergence of index funds in stock markets. He was awarded the 8 million crown ($1.25 million) prize alongside fellow economists Eugene Fama and Lars Peter Hansen.
In London after a trip to the World Economic Forum, he said that the Davos event had helped him understand that there is not just pessimism about the global economy, but worry.
"There's this increasing fear of technology, information technology, artificial intelligence, robotics, 3-D printers, the internet and all these different forms," he said.
Technology, he added "seems to be changing life in such a fundamental way and what it's leaving people thinking is 'where will I be in 30 years? Look how fast everything is changing now. Where will my children be? I want to leave something for them because they could be in terrible straits'."
The World Economic Forum's (WEF) Global Risk Report, released to coincide with last week's event, warned of people designing "bespoke viruses as murder weapons" and that computers could turn rogue.
In Davos, Yahoo chief executive Marissa Mayer told delegates that she expected internet privacy to swing further into the hands of governments over the coming months. At another seminar, the Daily Mail reported, a panel of academics warned of mosquito-sized robots flying around and stealing DNA samples.