ZHANG, Ruda February 24, 2019:  Replace superscript * to ∗ [d60bd7f]
ZHANG, Ruda December 30, 2018:  Use dollar style math markup. [1b7036c]
ZHANG, Ruda March 23, 2018:  Global remove trailing whitespaces [2b7ff90]
Ruda Zhang August 20, 2017:  notate Cheung1969 [a4325af]
Ruda Zhang June 02, 2017:  More on tenancy game [1ef4393]
Ruda Zhang June 01, 2017:  Format Cheung1969 [df64898]
Ruda Zhang June 01, 2017:  More on tenancy game. [c071526]
Ruda Zhang May 31, 2017:  Notes on mechanism design and economics. [dbec6fd]
Ruda Zhang May 25, 2017:  Format EconExp; more on mechanism design. [c28b54a]
Ruda Zhang May 23, 2017:  Fix format [2a8f89d]
Ruda Zhang May 22, 2017:  Fix format [5e2bdff]
Ruda Zhang May 22, 2017:  Add quotations [69d3ba3]
Ruda Zhang May 22, 2017:  Add book: Theory of Share Tenancy [297114d]