Diffusion of innovations Economic development Economic growth Economic policy Growth models Growth policy Growth rate Labour supply Mathematical models Population Quality of growth Technological change Μαθηματικά μοντέλα Οικονομική ανάπτυξη Economic analysis Economics Growth potential Innovations Macroeconomics Migration Per capita income Production functions Quality control Savings Statistical data ΜΑΘΗΜΑΤΙΚΑ ΜΟΝΤΕΛΑ ΟΙΚΟΝΟΜΙΚΗ ΑΝΑΠΤΥΞΗ