According to the theory of comparative advantage, trade and specialization productivity by opportunity costs.

According to the theory of comparative advantage, trade and specialization Raise productivity by lowering opportunity cost.
According to this theory, focussing on something that does not give the company in a competitive advantage will only wasting up resource because they simply compete with the companies who have the competitive advantages.

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.