In analyzing a merger, incorporating the macro context is vital. For very large mergers, for instance, public policy concerns inevitably surface even if they are typically ignored not only in merger analyses, but also by in societal and even governmental public discourse. Analysis at this level takes a societal standpoint, including on the relationship of business and government. This does not diminish the salience of firm-level analysis, for even how the respective organizational cultures would mesh is very important to a functional merged company. This is even true regarding the respective business-ethics climates, for it is not a given that a healthy organizational culture dominates an unethical one.
The full essay is at "On the United Technologies-Raytheon Merger."