I have a situation where there are two alternative assumptions that can hold in order for some estimate to be correct. I would like to number them 2.a and 2.b and refer to them in the text (an assumption 1 already exists). So far I do the following, which gives assumption numbers 2 and 3:
\documentclass[11pt,a4paper]{article}
\usepackage{amsmath,amsfonts,amssymb,amsthm}
\theoremstyle{plain}
\newtheorem{assumption}{Assumption}
\begin{document}
\begin{assumption}[Comparability]\label{as:comparability} Individuals with the same $x_{it}$ vector are \textit{comparable} over time.\end{assumption}
\begin{assumption}[Comparability in differences; replacing Assumption \ref{as:comparability}]\label{as:comparabilityDiff} Differences between individuals $i$ and $j$ with the vectors $x_{it}$ and $x_{jt}$ are \textit{comparable} over time.\end{assumption}
What Assumption \ref{as:comparabilityDiff} implies economically can best be explained using an example…
Is there a way to do this in with the amsthm package? I have seen this post (link), but don’t know how to reference the theorem in this case.
Best Answer
Something like this? Not the best solution, I assume, I'll try to improve it later on.