Smartphone sales have stagnated in developed countries, but they continue to experience high growth in emerging economies. Which aspect of the industry does this trend reflect

Open innovation

Explanation:

In a bid to drive growth and revenue, organizations and develop products which are customer friendly and centric, company's may decide not to rely on internal expertise or ideas within its own staff or designers, such that they seek external resources in a bid to mould their product offering in a systematic manner. These idea of seeking external knowledge or opinion in other to develop consumer products is called open innovation. It is a major trend which could be used to explain the push and increase in smartphone sales in developing economies as the companies tries to move in line with the current status.

answer; by looking at total product,marginal product,and changes in both after changes in inputs

answer; dividing net income by 1- t ;