Refer to the following table when answering the following questions.
Table 4.1: Production Model's Prediction for Per Capita GDP (US = 1) 
(Source: Penn World Tables 9.0)
-One explanation for the difference between the predicted output per person and the observed per capita GDP in Table 4.1 is differences in:
Definitions:
Sale Received
Sale Received refers to the total amount of money obtained from the sale of goods or services before any deductions or returns.
Purchase Cost
The total amount expended to acquire a good or service, including the item's price and additional charges related to procurement.
Accrued Interest
Interest that has been incurred but not yet paid, representing the cost of borrowing money over a period of time.
Commission
A fee paid for services, usually a percentage of the sale made or a transaction completed.
Q4: According to the income approach to GDP,
Q18: Keller Company paid its sales employees $1,200
Q27: Income per person began at _ in
Q41: A benefit of economic growth is increased
Q53: Suppose k and l grow at constant
Q59: Suppose k grows at a rate of
Q64: A banker may perform a financial ratio
Q68: Consider the three production functions in Figure
Q75: Name three of the fastest-growing countries from
Q83: The only requirement involved in communicating useful