The Nature of Liabilities(英文版)(ppt 58页)

The Nature of Liabilities(英文版)内容提要：
Interest Payable：
Interest expense is the compensation to the lender for giving up the use of money for a period of time.
The liability is called interest payable.
To the lender, interest is a revenue.
To the borrower, interest is an expense.
……

Allocating Installment Payments Between Interest and Principal：
Identify the unpaid principal balance.
Unpaid Principal ?Interest rate = Interest expense.
Installment payment - Interest expense = Reduction in unpaid principal balance.
Compute new unpaid principal balance.
……

Actuaries make the pension expense computations, based on:
Avg. age, retirement age, life expectancy.
Employee turnover rates.
Compensation levels.
Expected rate of return for the fund.