Bill Gates away half of its value, as detailed in "The Power of Half". Gates and his wife invited Joan Salwen to Seattle to speak about what the family had done, and on December 9, 2010, Bill and Melinda Gates, and investor Warren Buffett signed a commitment they called the "Giving Pledge." The pledge is a commitment by all three to donate at least half of their wealth over the course of time to charity. Gates has also provided personal donations to educational institutions. In 1999, Gates donated $20 million to the Massachusetts Institute of Technology (MIT) for the construction of a
Bill Gates edible, again getting a "Yes". Some say that this is an homage to Seinfeld's own show about "nothing" ("Seinfeld"). In a second commercial in the series, Gates and Seinfeld are at the home of an average family trying to fit in with normal people. Since leaving day-to-day operations at Microsoft, Gates has continued his philanthropy and works on other projects. According to the Bloomberg Billionaires Index, Gates was the world's highest-earning billionaire in 2013, as his net worth increased by US$15.8 billion to US$78.5 billion. , most of Gates' assets are held in Cascade Investment LLC, an entity through which