Two economists from Ohio University estimated that the demand curve for kerosene in Indonesia was such that a 10 percent increase in the price reduced the quantity demanded by 2.2 percent and that a 10 percent increase in the price of electricity increased the demand for kerosene by 1.6 percent. This indicates that (i) the demand for kerosene is price inelastic and (ii) kerosene and electricity are substitutes. Which of these two statements is correct?

a. i not ii
b. ii not i
c. i and ii
d. neither i nor ii

The business cycle is the periodic but irregular up-and-down movement in economic activity, measured by fluctuations in real gross domestic product (gdp) and other macroeconomic variables. a business cycle is typically characterized by four phases—recession, recovery, growth, and decline—that repeat themselves over time. economists note, however, that complete business cycles vary in length. the duration of business cycles can be anywhere from about two to twelve years, with most cycles averaging six years in length. some business analysts use the business cycle model and terminology to study and explain fluctuations in business inventory and other individual elements of corporate operations. but the term "business cycle" is still primarily associated with larger (industry-wide, regional, national, or even international) business trends.