In this paper, we use the data from the firm survey (2002) at the micro level and some recent and update current secondary data at the macro level to examine the importance (impacts) of tacit and codified sources of knowledge at firm and aggregate levels respectively. Our results at the macro...

In this paper we provide a new contribution and fill the gap in the Sudanese literature by investigating the importance (impact) of tacit and codified sources of knowledge at the micro and macro levels in Sudan using new primary data from the firm survey (2010) at the micro level and secondary...