Trying to find a source that provides monthly or at worst quarterly data of the GDP in the Eurozone area. During my research, I found this link click but it is annual and it does not allow you to change to quarter.
Apart from that I would like it to be reliable and free of charge.
So I have also found this 1 which is quarterly data published by ECB. However there seems to be a large deviation on the values reported by these two links. Their difference is not that obvious to me.
Any insights on their differences?