Its very good for the economy, if we are being specific. Medicinal Marijuana can bring in millions if not billions of dollars annually if properly managed and properly produced as a finished product. The medical advantages of this plant are plenty but let just throw in some statistics on the financial aspects and job creation:
Legalizing marijuana on the federal level could result in an additional $105.6 billion between 2017 and 2025, according to a new report from the cannabis analytics firm New Frontier. That figure includes projections for business tax revenues, payroll withholdings, and a 15% sales tax. Meanwhile, fully legalizing cannabis today would add 654,000 jobs and up to 1 million jobs by 2025.
The US Citizen needs to talk about if they want to legalize marijuana or not, not the economy part. I mean I understand when you legalize there is a given boost to economy and there are weed companies that already made billions of dollars in valuation and a lot of money in sales but in reality the economy is so big that just couple states wouldn't change a thing.
You need to make it all states in order to give a real boost to economy. On top of that people do not vote for these types of decision based on if the economy will benefit from it or not, they vote based on if they want to use it, let people use it, or against others using it. So if a state says "yes legalize it" it doesn't mean "it will be good for economy" it would mean "I want some weed and no problem with cops".