What are the differences between government bureaucracies and the bureaucracies found in large corporations?

I'm writing a paper for my american governemnt class, I have some ideas that I'm going to use, but I'm interested in hearing more opinions. The question is as follows

What are the differences between government bureaucracies and the bureaucracies found in large corporations? How do they compare in terms of size and diversity of functions? What role does power play in each? How do expectations influence their respective behaviors?

Thanx in advance for the input.

government bureaucracies

Administration of a government chiefly through bureaus or departments staffed with nonelected officials.

The departments and their officials as a group: promised to reorganize the federal bureaucracy.

Management or administration marked by hierarchical authority among numerous offices and by fixed procedures: The new department head did not know much about bureaucracy.

The administrative structure of a large or complex organization: a midlevel manager in a corporate bureaucracy.

An administrative system in which the need or inclination to follow rigid or complex procedures impedes effective action: innovative ideas that get bogged down in red tape and bureaucracy.

bureaucracies found in large corporations

The large corporation is the productive engine of the modern

industrial world. The contemporary view of the corporation

sees it not as an agglomeration of assets or contracts, but as

a holder of specialized resourcesâ€"rights, reputations,

routines, and competencies. The very size of large corporations

signals the presence of unusual concentrations of

these specialized resources. The corporation’s organization

is both the repository of special competencies and the agent

for the creation of new resources. Hence the critical

distinctive feature of the modern large corporation is its

organizational form.