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Rohit Lamba Profile picture
Rohit Lamba
@rohlamba
Economist, Himalayan boy, poetry enthusiast, foodie. Amor fati :)
May 31 • 6 tweets • 3 min read
India has just recorded an impressive 8.2 percent growth rate for the financial year. Interpreting GDP numbers correctly is important, otherwise we can prescribe misdirected policies. What is behind the headline number? Short 🧵 Image GDP = GVA + taxes - subsidies. Over last few quarters GVA growth has gone down and GDP is recording a higher number because subsidies this year have decreased 23 percent year on year. GVA is at 7.2 for the financial year. Eventually GDP & GVA tend to converge. Image
Feb 11, 2023 • 9 tweets • 3 min read
Are you teaching graduate economic theory semester? Here is a wonderful paper by @homoludio to teach in your class.

In many markets, a two-sided centralized platform, and decentralized bilateral trades thrive simultaneously. What is a good theory for such markets? Buckle up... Image Regulators often worry about the monopolization of markets by profit-maximizing marketplaces (think Uber, Airbnb, Amazon) and their welfare impacts.

In mechanism design, we tend to assume that all trade takes place within the mechanism [with notable exceptions, of course].
Jan 26, 2022 • 8 tweets • 3 min read
1/ Inverse Selection, new paper with @MarkusEconomist and Carlos Segura-Rodriguez.

With the advent of Big Data, AI and Machine Learning, should we think about standard screening models, eg. used for insurance or credit markets, differently?

papers.ssrn.com/sol3/papers.cf… 2/ Most models in information economics assume that customers have an informational advantage. Hence, the principal, e.g. the insurance company, faces an adverse selection problem, which it tries to mitigate by offering a menu of screening contracts to potential customers.
Dec 19, 2020 • 15 tweets • 6 min read
0/ A holiday economic theory reading list. Some of my favorite pieces on theory that can be read with minimal sweat, but with the maximal intellectual reward. In no particular order: 1/ Myerson 1999. "Nash equilibrium & history of economic theory." JEL. Written with characteristic Myersonian elegance. "how a few short papers by a young mathematician achieved one of the great watershed breakthroughs in the history of social science."
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