What is the Consumer Price Index (CPI) and how is it...

Name: Problem 7, Chapter 26: Economics Principles, Problems, and Policies
Uploaded: 2020-06-03T14:02:57-08:00
Duration: 3 min 25 s
Channel: Arrushi Agarwal
Description: What is the Consumer Price Index (CPI) and how is it determined each month? How does the Bureau of Labor Statistics calculate the rate of inflation from one year to the next? What effect does inflation have on the purchasing power of a dollar? How does it explain differences between nominal and real interest rates? How does deflation differ from inflation?

What is the Consumer Price Index (CPI) and how is it determined each month? How does the Bureau of Labor Statistics calculate the rate of inflation from one year to the next? What effect does inflation have on the purchasing power of a dollar? How does it explain differences between nominal and real interest rates? How does deflation differ from inflation?

Key Concepts

Consumer Price Index (CPI)

The Consumer Price Index is an economic indicator that measures the average change over time in the prices paid by urban consumers for a market basket of consumer goods and services. It is determined monthly by collecting prices on a standardized group of items from various retail and service outlets, and then aggregating these prices into a single index using predetermined weights that reflect consumption patterns.

Inflation

Inflation refers to the rate at which the overall price level of goods and services in an economy rises over time, diminishing the purchasing power of money. It is typically measured as an annual percentage increase in the CPI, where the current index is compared to the index from one year prior to determine how much prices have increased.

Purchasing Power

Purchasing power is the value of money expressed in terms of the quantity of goods or services that one unit of money can buy. As inflation increases, each dollar buys less than before, reflecting a reduction in its purchasing power, which can impact consumer behavior and overall economic well-being.

Nominal vs. Real Interest Rates

Nominal interest rates refer to the percentage yield on savings or loans without adjusting for inflation, while real interest rates adjust for the effect of inflation. The difference between these rates represents the true cost of borrowing or the true yield on investments, accounting for the erosion of purchasing power due to inflation.

Deflation

Deflation is the opposite economic phenomenon to inflation, characterized by a sustained decrease in the general price level of goods and services. While inflation erodes money's purchasing power, deflation increases it, but can also lead to negative economic consequences such as reduced consumer spending and increased real debt burdens.

Transcript

00:01 Our question has five parts.

00:03 The first part asks us about the cpi.

00:06 The cpi reports the price of market basket of some 300 consumer goods and services that are purchased by a typical urban consumer.

00:17 It is used to report the inflation rates of each month and each year.

00:24 Next part of the question asks us how the bls calculates the rate of inflation from one year to the next.

00:30 The bls updates the composition of market basket every two years so that it reflects the most recent patterns of consumer purchases and captures the inflation that consumers are currently experiencing.

00:45 The bls arbitrarily sets cpi equal to 100 for 1982 to 1984.

00:52 So, cpi for any particular year is found by the following formula.

00:57 Cpi is equal to the price of the most recent market market.

01:00 Basket in the particular year, divided by the price estimate of the market basket in the year 1982 to 1984, which was described as 100, multiplied by 100.

01:12 The third part of our question is asking about what effect inflation has on the purchasing power of a dollar.

01:21 Before answering that, we need to know what the rate of inflation is equal to.

01:24 The rate of inflation is equal to the percentage growth of cpi from one year to the next.

01:31 The is as follows.

01:33 Now, we can get back to the effect of inflation on the purchasing power of a dollar...

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