Hello reader,

I am a beginner when it comes to data-analytics and I have been trying to conduct an event study using the tool Eventstudytools.com/barc/upload; as I need any assistance I can get. However, after closely following all instructions and formatting requirements, I am left with the following error: ''Duplicate entry in firm data: 13312;2011-01-03''.
The tool does not allow for duplicates in my share price variable, even if the date is different. For the firm with identifier 13312, the stock price was 44.2 on both 2011-03-23, and 44.2 on 2011-03--22. This is a very common occurence in my large dataset. Do you guys have any idea how to resolve this? I am desperate.

I apologize for the sloppy formatting,

Best regards,

Ronald