Sentence 1: He doesn't earn as much as me.
Sentence 2: He doesn't earn as much as I.
In sentence 1, the second "as" is a preposition so it is followed by an object pronoun.
In sentence 2, the second "as" is a conjunction, and the complete sentence should be "He doesn't earn as much as I earn". Am I right?
Best Answer
I'd prefer putting I because it's used in its truncated form.
However, I think it's a matter of register, the style you write. Because I have also observed authors using me. In modern English, either seems okay as they convey the message.