The federal government is reviewing the supermarket code of conduct over concerns about the gap between food prices charged by big supermarkets and those paid to farmers.  While a separate senate inquiry will examine alleged price gouging by Coles and Woolworths in coming months. Supermarkets have denied accusations of profiteering and say they’re experiencing economy-wide inflationary pressures.  Today, business columnist Elizabeth Knight what an inquiry may be able to tell us.Subscribe to The Age & SMH: https://subscribe.smh.com.au/See omnystudio.com/listener for privacy information.