I'm writing fanfiction for the superhero serial novel Worm. The main setting in Worm is Brockton Bay, a failing city of about 300,000 people. The economy has been in decline since the decline of shipping through Brockton Bay. I assume manufacturing has also fallen as well. The people of Brockton Bay are largely poor, and superpowered gangs are in control of large sections of the city. (A side note for manufacturing: Japan in this story has been destroyed by a kaijuu, and China is a closed economy.)
The economy of Brockton Bay is not all bad, however. There is a section of the city that is fairly rich due to tourism. The city has the most superhumans per capital, and attracts people on that basis.
What economic problems are likely plaguing this fictional city? How would you solve them? I'm willing to put in work to worldbuild, but I'm only an amateur economist. I'm thinking of basing the economics of Brockton Bay on Detroit, but I'm willing to read up on other failing cities as well. Thanks for your help :)
Edit: A bit more detail on economic problems:
The justice system is corrupt. The two major gangs are White and Asian. The White gang is well-organised, the Asian gang not so. I imagine the White gang holding on to wealthy suburbs and charging protection fees.
The education system is likely failing, so a good segment of the population is illiterate.
Unemployment is high, which feeds into the gangs. Probably 20%? I'm basing this off of Detroit unemployment rates.
Due to Japan being devastated, and China becoming a closed economy, there are a lot Asian immigrants. Some are rich, some are poor. The poor Asians are used illegal as cheap labour to support unproductive manufacturers.
That's all I can think of right now. As for more specific questions, I'd ask: How would you develop infrastructure, when the city is broke? Which infrastructure do you prioritise? How would you fix the justice system? The education system? On which do you prioritise your energies?
How do you create more jobs? Do you use macro policies? Or targeted policies? Do you implicitly encourage illegal immigrant labour? Or regulate working conditions? How do you improve productivity?
Edit: I've taken a look at Worldbuilding. It looks helpful. Thanks for the tip!
– user49357 Nov 19 '14 at 09:19"I'm basing this off of Detroit"--I love how Detroit is the model for your post-Apocalyptic hell-scape. – Steve S Nov 19 '14 at 11:22