Hi, I planned on running a multi-regional analysis using zip code level data. However, when setting up the model for the direct effects I got the following message: "The Trade Flows data could not be located, do you want to use Econometric RPC?" The problem with using Econometric RPC is that you can only run a multi-regional analysis with the Trade Flows Model. So I have a few questions: 1) What is the difference between Trade Flows Model and Econometric RPC? 2) Is this issue related to use of zip code level data? 3) What other options do I have if I want to model the effects of direct investment in one area (defined by zip codes) on a larger area (defined by additional zip codes? 4) Perhaps as an option I can combine the zip codes in the smaller and larger areas into a single region model and model the investment that way. Thank you, Lorianne
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