Bob decides to install fire-prevention sprinklers in his townhouse. how does his decision affect his next-door neighbors?

1. As they will come to know the use and the safety given by the device they will show eagerness to install their fire-prevent sprinkler system. 
2. This may affect their neighbors as Bob is well aware of the fire. So they should also show awareness...

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.

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