So quick Economics so people can see where i'm standing:
Looking up their current national debt as a percent of GDP, and divide that by 1 minus the proportion of their GDP that's government expenditures, and then comparing that to USA GDP divided by 1 minus the percent of our GDP that's government expenditures, we still see Puerto Rico falling behind the USA. of course the mechanisms of our GDP is are quite similar in terms of what we have HOWEVER, their debt is 68% of GDP compared to our 100%+ debt of GDP
however, there debt has been caused by us STOPPING subsidies to them, and they've defaulted on some debts recently, hinting that the situation is getting worse not better.
For an overarching trend what we need to see are the last 8 years of taxable income that we could collect, but even THEN we have a problem because once Puerto Rico joins the USA then any businesses using them as a tax shelter are going to flee.
So there's a lot of the clandestine economy that'll be difficult to predict, and Puerto Rico had a high risk of natural disasters, so joining the USA could mean better solvency and economic security, but unfortunately it's fall under a lot of sanctions that Latin America and other countries have on the US, and any change means uncertainty, and any uncertainty means a volatile market. PLUS with natural disasters that might help the locals, but it'd hurt the current 50 states in terms of finances
But even with their debt and costs, Puerto Rico’s GDP is on a rise despite a depression for the last decade or so... but they’ve also gotten tax exemptions for US corporations. that would go away if the US got involved, meanwhile their tax system is remarkable similar to ours, but they’d have a Decrease in taxes on the middle class and an Increase in taxes on the upper class if they joined, but neither by a massive margin, though considerable. this could mean some potential solutions to their debt problems, and once again, better solvency.
the problem is with poverty, and how much it'd drain the US and make Puerto Rico more based in dependency than in profitability. poverty rates are decided by those individuals who are employed and whose household equivalised disposable income is below 60% of national median equivalised income are in poverty... and Puerto Rico has more people who’d suddenly qualify under that if they were to be pushed up to the USA's level. also, Puerto Rico has a lot of food crises, and your capability to consistently find food is ANOTHER measure of poverty, so that’s a negative. of course easier trade within the USA would help counteract that, but the balance seems to be pointing to red for the USA (the current 50)
a slight positive, they’re about 30th in the international ppp per capita rankings, but that’s well behind the USA, but if there's going to be a nation we COULD add, it'd be puerto rico.
overall analysis of the economics:
not a great deal for the USA, and only offers profitability in the long run.