In virtually any industry, technological improvements increase labor productivity, which is the output of goods and services per person-hour worked  In Parland' s industries, labor productivity is significantly higher than it is in Vergia' s industries
Clearly, ttherefore, Parland' s industries must, on the whole, be further advanced technologically than Vergia' s are
It takes a condition to be the effect of something that happened only after the condition already existed.