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Question #2: Large scale event study

I am currently conducting a large-scale event study. I am using R and the EventStudy package. It turns out that I am only able to upload around 2000 stock prices otherwise I receive the error code:

Request Status Code: 500
Error: Argument 'txt' must be a JSON string, URL or file

Is there any way to use the package for a large amount of data e.g. 200k stock prices in the overall analysis?

Answer by Dr. Markus Schimmer:
We strongly recommend using the API directly for large-scale studies. This will give you also some additional flexibility in structuring the analysis - if needed.
Question #1: What's your current API key?
Answer by Dr. Markus Schimmer:
You find the API key on this page: