Policy Impact DiD Analysis

I need a concise Differences-in-Differences (DiD) study that pinpoints the impact of a recent policy change. I already have repeated cross-sectional data covering two clearly defined groups—one exposed to the policy and one that is not—along with the relevant time indicators... (Budget: $30 - $250 USD, Jobs: Data Analysis, Data Visualization, Python, R Programming Language, Regression Analysis, Statistical Analysis, Statistical Modeling, Statistics)