I agree that my question is a good fit for another site, but it's clear that it's on topic here too

Question

According to the help center:

Matters of Policy:

Central to the idea of this site are the nuts and bolts of policies introduced by governments, presumably for the welfare of their citizens. As such, asking about the tangible benefits and costs of legislation is on topic

So while I agree that my question would be good on Economics.SE, I think according to this site's policy it's also on topic here and therefore shouldn't be closed.

Unless we decide to change your scope to exclude economic policy questions.

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Since the senate passed the tax bill this month that's left me confused. I try to look at both sides of partisan politics rather than joining one team and hating everything about the other. Now to understand whether this tax bill (which largely cut taxes for the rich) was something good for the country or not, I need to know if trickle down actually works.

People on the Left swear it doesn't. But I'm looking for an objective, non partisan explanation of whether or not Trickle Down economics has been effective in the past. From what I understand it's been tried many times throughout history by now, as far back as the 1890s when it was called "horse and sparrow theory" according to Wikipedia, so it seems like we should have data to show whether or not it improves the economy.

Is there any record of Trickle Down Economics improving the economy?

I'm specifically asking about "the tangible benefits and costs of legislation" as defined in your help center.

Answer 1

We have already established in 2014 that macroeconomics is in scope on this website. I therefor reopened the question (two other users already casted reopen votes at that point).

Answer 2

The answer already posted by @Philipp confirms that macroeconomics is within scope here, but doesn't really explain how to resolve the situation when a question is legitimately on topic at two or more SEs. As such I'd argue it doesn't answer your question completely.

I did post a similar question to Meta.SE not long ago (Is "closer match to another SE" a reason to close an on-topic question as off-topic?), and the answer included this quote from What is migration and how does it work?

We only migrate questions because they are off-topic on the original site. It is perfectly possible for a question to be on-topic on multiple sites, but that is not a reason to migrate it elsewhere, unless the OP requests migration. As a general rule, if someone asks a question here, and it's on-topic here, it should stay here.

So as general SE policy, if a question is on-topic where it is originally posted then it should not be closed as off-topic, and should not be migrated unless the poster requests migration.