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Bharat Chandar Profile picture
Bharat Chandar
@econ_b
PhD candidate in economics at Stanford GSB. On the 2024-2025 academic job market.
Nov 20, 2024 • 12 tweets • 5 min read
Excited to share my #JMP! #EconTwitter

How has composition of college grads changed over time? What are implications for the college wage gap?

I estimate the college wage gap would have grown 4x faster from 2002-2019 if composition held fixed!

drive.google.com/file/d/1UeQ7SH…Image Background: college wage gap >60% in 2019 even as share of workers w/ a college degree grew to over 40%

Implies growing relative demand for college workers (Katz-Murphy)

But changes in college share also affect composition of college grads!

@arpitrage tinyurl.com/m95sa64p
Oct 21, 2019 • 25 tweets • 5 min read
My paper "The Drivers of Social Preferences: Evidence from a Nationwide Tipping Field Experiment," with @UriGneezy, John List, and Ian Muir is now out as an NBER working paper. We analyze over 40 million tipping outcomes on the Uber app in 2017. THREAD

nber.org/papers/w26380 First facts:

16% of UberX trips are tipped

60% of riders who took at least 10 trips never tipped

Conditional on tipping, people tip a little more than $3 on average (about 26% of the fare), so the average tip, including cases where the rider did not tip, is about $0.50