This document discusses the meaning and calculation of merger effects. It defines a merger as the voluntary amalgamation of two firms into a new legal entity. Mergers can be horizontal if the merging entities are competitors, or vertical if they are suppliers/customers. Reasons for mergers include synergy, diversification, eliminating competition, growth, and acquiring resources/skills. The document provides an example calculation. Company X is acquiring Company Y in a stock-for-stock transaction. It calculates the pre-merger EPS, P/E ratios, share exchange ratio, post-merger EPS, and post-merger market price per share for the combined entity based on financial information provided for Companies X and Y.