Final answer:
Reasons for the failure of downsizing efforts typically include poor early management decisions, impediments to resource reallocation, and negative externalities, but not the difficulty of achieving cooperation in large groups leading to a split.
Step-by-step explanation:
One of the reasons for the failure of most downsizing efforts that does not fit with the others provided is the statement about cooperation being difficult to achieve in large groups, leading to a split and the search for other resources.
This is not commonly associated with downsizing, which refers to the reduction of a company's workforce in response to economic challenges.
Instead, the reasons that typically lead to the failure of downsizing efforts include poor management decisions early in the process, the inability of resources (labor, capital, entrepreneurs) to move to other markets, negative externalities of such downsizing, and the impact of outsourcing on domestic jobs.
These cause a variety of detrimental effects such as decreased morale among remaining employees, reduced organizational commitment, and increased job insecurity.