https://site.warrington.ufl.edu/ritter/files/2018/01/IPOs201...
66% of the "other" category (ie everything else) reported being profitable. Something the article goes out of its way to not mention.
The 30 tech IPOs and the 32 biotech IPOs dramatically tilt the number of unprofitable listings as a percentage.
If you only have 108 IPOs and 32 are biotechs, which are almost always unprofitable, you start with an extreme tilt.
https://site.warrington.ufl.edu/ritter/files/2018/01/IPOs201...