There are 13 cities on the list and all of them are in Europe. The ranking is made based on the best balance between people's work and their leisure time. It takes into account the number of hours that people work per week and per year along with the number of days they take on holidays.

PayScale, online salary, benefits and compensation information company, made a ranking of the best companies based on high employee satisfaction. They used six criteria: high job satisfaction, low job stress, ability to telecommute, high job meaning, experienced median pay (for employees with at least five years of experience), and whether a company pays above or below market price for their employees.

According to Glassdoor’s 2016 rankings, online travel company Expedia is the happiest place in London to work at.

Expedia employees get unbelievably generous benefits like travel allowance between $8,515 and $14,192. And they have Formula One simulators, a huge roof terrace that hosts regular BBQs and other staff parties, various free bars, and more "chill out zones" in the at the company's two huge offices in London.

Business Insider analyzed US Census data for 478 jobs. According to the data they found, the average working American works about 39 hours a week, and the median earned income across all occupations is $32,000.