According to the production model with 𝑦 𝑖 = 𝐴 𝑖 𝑘 ¯ 𝑖 𝛼 , ______.  Select all correct answers.多项选择题

countries with more capital per person generate higher incomes, all else equal.

incomes per capita are proportional to capital-labor ratios (e.g., countries with twice as much capital per person produce twice the amount of output per person).

the exponent 𝛼 is equal to the labor income share of the economy.

predicts that some countries have higher incomes per capita than the United States.