In response to COVID-19 , a new method is required to investigate the equality of access to food stores . However , studies analyzing the fairness of access to food stores in terms of consumer demand are rare , and little research attention has been given to access to food stores in Taipei City . In this study , the Gini coefficient was used prospectively to quantify the equality of access to food stores at the city and village levels in Taipei . The experience of older adult citizens was also considered , and the Gini coefficients of older ( over 65 years ) and non - older subpopulations were investigated . This approach allowed us to obtain accurate data on Taipei as an aging society and to examine whether specific groups face worse fairness than others do .