The rash of corporate mergers and acquisitions erupting in recent months is fueling a re-examination of big pay packages for top executives at acquired companies.

Earlier this month Equilar, a compensation analysis firm in San Mateo, California, reviewed the executive compensation and severance plans triggered by 10 mergers and acquisitions announced last year. Although not often a fair measurement, executives and companies draft compensation and severance agreements based on what their peers are receiving.