part c- limitations of CPI in rate of inaltion

• what's a limitation of RPI?

  excludes all households in top 4% of incomes
• what's a limit of CPI?

  covers a broader range of pop but doesn't include council tax or mortgage interest payments
• info given by households in Living Costs and Food survey can be inaccurate
• how often does the basket of goods change?

  changes once a year- may miss some short-term changes