Inferior goods are goods whose demand falls when income rises and increases when income falls.
When the price of beer changes, there are two effects that determine the quantity demanded. They are :
1. the substitution effect
2. the income effect
The substitution effect looks at the change in price of a good relative to other goods. When the price of beer decreases, it becomes cheaper relative to other goods. Thus, the demand for it increases.
The income effect looks at how a change in price affects real disposable income. When price of beer reduces, disposable income increases. Because beer is an inferior good, it would lead to a decrease in the demand for beer
Her daily periodic interest rate is 0.05%, her monthly periodic interest rate is 1.58%, and her semiannually periodic interest rate is 9.5%. APR stands for the annual percentage rate of an interest rate of a person. The periodic interest rate is the portion of an annual percentage rate based on a specified period such as daily, monthly, and semi-annually. The Periodic interest rate is calculated by dividing the APR by the specified period such as 365 for the daily period, 12 for the monthly period, and 2 for the semi-annual period<span>.</span>