I originally (2017 reading) gave this seemingly impressive bit of research and analysis three reluctant stars. I didn't like the fundamental interpretation of the data Reinhart and Rogoff had studied, but they had compiled what I thought to be a useful dataset with interesting anecdotes of historical instances of mass psychoses in the rush to GET RICH QUICK. In the spirit of Galbraith, I enjoyed reading about several acute instances of financial folly, a few for the first time.
Inevitably, these "crashes" involved, just like our own recent banker-engineered crisis, a small number of crooks deceiving and exploiting masses of naive investors (i.e. their clients, pensioners/retirees, and others dependent on public support), up to a point when it fell apart and the crooks had to move onto the next big scheme. Said crooks may sometimes lose money alongside their victims, but, aside from the occasional patsy, they ALWAYS escape any kind of justice for deliberative fraud. There is no punishment for financial malpractice unless you confess to it (Madoff's second mistake and the only reason he went to prison). They are the social descendants of cattle rustlers, claim jumpers, and other successful robber barons of legend.
Anyway.
As I'm not a proper economist, only playing at one for work, I have a disproportionally large chip on my shoulder when it comes to shoddy research conducted by the pros. Even more so for outright fraudulent work, of course. I was not convinced with R&R's conservative conclusions, but remained reluctantly impressed with the work as noted.
Reinhart and Rogoff concluded (not posited, this is ECON) that, as the ratio of government debt to GDP (that most garbage of all the garbage econ stats) increased above 90%, the economy was much more likely to "crash" (i.e. shrink). (90% being a not-uncommon level as Western "democracies", China and Japan have semi-Keynes'ed their way out of negative growth in a doomed attempt to rescue neoliberal market Capitalism)
High government indebtedness leads to a smaller economy. OK. That's intuitive. If the public are paying for adequate institutions providing education, health care, safety services, utilities, etc., then there is no incentive for individuals to spend additional money on these things, and GDP, that old liar, is not inflated by superfluous spending. Good. Efficient. Fair-er.
But, R&R were writing a compelling story about crashes and therefore had to fudge things further with their qualitative analysis: not only does GDP shrink, but all the speculators lose money. OK. Also good. Speculation is risky. If speculators never lose money because the more prudent public keep bailing them out, then speculation becomes the norm. This is why the crooks always have something cooking - BTC, AI, Fintech, Biotech, CDOs, MBS, BRICKS, yadda yadda. The next big money maker, trying to attract clients/victims. This was my conclusion.
R&R thought their iron law meant something else - that government just shouldn't be spending money on good institutions that rich and poor alike would enjoy. It's better for GDP if we allow wealthy individuals, behind the legal protections of corporations, to make a profitable market for those public goods. Then, we have the neoliberal wet dream of businesses "competing" to provide public goods AND making shedloads of money doing it as the masses get to shop! Woo hoo.
Anyway.
I then turned to the internet to learn more...
Aha. Reinhart and Rogoff had had been outed in 2013 as deliberate frauds. They faked a bunch of their data and their model was deeply biased to support their conclusion. R&R's new law of government indebtedness is revealed as bullshit.
Harvard was deeply embarrassed; Reinhart and Rogoff were disgraced and fired. ;->
No. The book remains in print and is used in Finance courses, ten years later. Politicians and manipulative policy advisors still refer to it in support of deregulation of essential services and austerity measures that literally kill people and cause lifelong trauma for survivors. Reinhart and Rogoff, despite their gross professional academic fraud, still have their jobs with Harvard. Harvard has more power than any mythical god. There is no justice.