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DDT was first used as an insecticide in 1942. Resistance genes existed before this time in houseflies and other insects. By 1970, no farmer would bother using this chemical. Why?
Actuarial Error
Mistakes in the calculations or assumptions made by actuaries, which can affect insurance premiums, pension plans, and other financial assessments.
Consumption Smoothing
An economic concept that describes how individuals attempt to achieve a stable level of consumption over their lifetime, regardless of fluctuations in income.
Defined Benefit Pension
A type of pension plan where an employer promises a specified monthly benefit upon retirement, which is predetermined by a formula based on the employee's earnings history, tenure of service, and age.
Defined Contribution Plan
A retirement plan where contributions are defined, but the eventual payout depends on the investment's success.
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