1. Microfinance: October 2nd was the 10th anniversary of what I consider to be an underappreciated but critical moment in the history of the microfinance movement--David Roodman's piece on how Kiva actually worked. David had already been working on a book about microfinance that was going to be very influential--his open book blog as a whole is a remarkable contribution to the public good, one I wish many more people had decided to replicate--but the Kiva post (based on it being one of the most read blog posts in CGD history according to Justin Sandefur) brought a huge amount of attention to questions about how not only Kiva, but microfinance as a whole, actually worked. I re-read it this week and it's as good as I remember it and definitely makes me pine for the brief glorious time where the development blogosphere was a thing. There's another important anniversary this week for global microfinance though with a less arbitrarily neat number--Muhammad Yunus's Peace Prize was 13 years ago. Today many were surprised that Greta Thunberg didn't win. The explanation seeming to be both timing and the fact that there is not a direct link between climate change and conflict. There may be a narrowing of the scope of the Peace Prize given that there is certainly no connection between microcredit and reduced conflict. In case you didn't know the winner was Abiy Ahmed, the Ethiopian Prime Minister, who has done some pretty impressive things directly related to peace, like ending the conflict between Eritrea and Ethiopia and freeing thousands of political prisoners. For what it's worth the Economics Nobel announcement is Monday so expect to see more about that in next week's faiV. Some favorites with particular applicability to the faiV include some combination of Donald Rubin, Josh Angrist, John List and Guido Imbens for kicking off "the credibility revolution" and Michael Kremer, Abhijit Bannerjee, Esther Duflo and/or John List for kicking off the experimental revolution. Of course, I'm hoping for the latter because it would likely give a pretty significant boost to my book sales. But back to microfinance. Banerjee, Emily Breza, Townsend and Vera-Cossio have a new paper (presented at NEUDC) that uses the Townsend Thai village data and the expansion of a credit program to further bolster what should be the clear consensus on the effect of microcredit: on average not much, but very high returns for some. In this case, they find that there are very large gains for high productivity households who get access to credit (1.5 baht increase in profits for every 1 baht increase in credit) and even higher for those outside agriculture. This is broadly similar to earlier work, now in an NBER paper form, by Banerjee, Breza, Duflo and Cynthia Kinnan on Indian microfinance. Keep in mind, as we continue to see these results, that there is another side of the coin: is there a business model that can reach the high productivity borrowers more exclusively?
2. Inequality: If you think about within-country inequality, you think about taxes. Since the United States has had a huge explosion of income and wealth inequality in the last few decades, and there is a presidential election (hopefully) just over a year away there is a lot of discussion about the US tax system and how it has contributed to the growth of inequality and how it might be used to reduce it. This week there has been a lot of focus particularly on whether the US tax system is progressive or regressive, which seems intuitively like it should be a pretty straightforward question to answer. But the US tax system is so complicated, including not only collecting but distributing cash, it's a controversial question. Emmanuel Saez and Gabriel Zucman make the case that since the 1950s the US tax system has shifted dramatically toward being regressive. Here's David Leonhardt's shorter version of their argument with cool animated graphics. But not everyone agrees and those differences can't be traced just to ideology. Here's a thread from Jason Furman, former chair of the Council of Economic Advisors under Obama debating Zucman on methodology and interpretation. Here's David Splinter with a more in-depth analysis illustrating why Saez and Zucman get such different numbers than the traditional approaches to analyzing progressivity. Meanwhile, there is an entirely different question about whether taxes can be used to effectively address inequality (Saez and Zucman's book is all about how the wealthy evade taxes). There's a new NBER paper on the response of rich taxpayers to an increase in the California tax rate. It finds that just under 1% of those subject to the higher taxes moved out of state, and those who stayed found ways to avoid the tax, so that total income from the tax was about half of what it would have been otherwise. Here's Lyman Stone's Twitter summary. It's not clear how to think about that 50% cut in additional revenue: on the one hand, there is a big increase in tax collection, on the other hand you have to expect that over time people are going to get even better at evading the tax. Here's Lily Batchelder and David Kamin with a comprehensive review of wealth taxation in implementation with hope that wealth taxes can work.