Advice on applying for Economics graduate programs with a low GRE
The only way to know is to apply to one or more programs. If your record isn't strong in some area you may need to apply to several different programs. 

But for most institutions, no single number is likely to be an absolute block. You need to make your case. Why is it that you are a good candidate? Why are low scores not reflective of your ability? What can you add to a program you are part of? Some places may block you, but for those that don't, be ready to make your case through your other materials and especially in an interview. Showcase the positive. 

I wouldn't take drastic action until I explored the terrain a bit, however.