Friday assorted links by Tyler Cowen December 22, 2017 at 11:49 am in 1. Sakunthala’s books of the year. 2. ‘A unique Canadian problem’: Goalie rental apps connect teams with netminders. 3. Deciphering Incan knots. The key work was done by an undergraduate, by the way. 4. Do stronger norms mean less exclusion? 5. Turkey’s economic dilemmas.