Before revision:  While classic comparative statics is mainly concerned with qualitative approaches (e.g., deciding whether a marginal parameter change improves or hurts equilibrium profits or welfare), we aim at quantifying the possible extend of such an effect .
After revision:  While classic comparative statics is mainly concerned with qualitative approaches (e.g., deciding whether a parameter change improves or hurts equilibrium profits or welfare), we aim at quantifying the possible extend of such an effect .