Questions & explanations
1. Why is it important for a central bank to follow the Taylor principle?
Following the Taylor principle helps the central bank keep inflation under control. When the bank raises nominal rates more than inflation, the real interest rate rises. A higher real rate makes loans more expensive, so people and businesses borrow and spend less. This reduces demand and cools off the economy, stopping inflation from accelerating. If the bank did not follow the principle, inflation could spiral upward. For instance, if inflation goes up 2% but the bank only raises rates 1%, the real rate drops, encouraging more spending and even higher inflation. That would be dangerous. So the principle is a tool to prevent unstable inflation.
2. Compare a currency board with a regular central bank.
A regular central bank can set interest rates, print money, and lend to banks as needed. It has flexibility to fight recessions or inflation. A currency board has none of this freedom; it only exchanges local money for foreign currency at a fixed rate. A regular central bank can be a lender of last resort, but a currency board cannot create money to rescue banks. The regular bank can also let the exchange rate float, while the currency board locks it. For example, the US Federal Reserve is a regular central bank, while the Hong Kong Monetary Authority runs a currency board. Both aim for stability, but through very different methods.
3. What is a monetary policy transmission mechanism?
A monetary policy transmission mechanism is the process through which changes in the central bank's interest rate affect the economy, especially output and inflation. When the central bank raises or lowers its policy rate, it influences other interest rates in the economy, such as bank lending rates. These changes then affect spending by households and businesses. Over time, spending changes affect overall economic activity and price levels. There are several channels, like the interest rate channel, credit channel, and exchange rate channel. Understanding these channels helps central banks predict the impact of their decisions.
4. Compare classical theory to Keynesian theory of interest.
Classical theory says interest is a real phenomenon determined by saving and investment. Keynesian theory says interest is a monetary phenomenon determined by money supply and demand. Classical theorists believe that saving increases automatically create investment through lower rates. Keynesians argue that saving does not always lead to investment because people may hoard cash. In the classical view, interest rates adjust quickly to clear markets. In Keynesian theory, rates can be sticky and the economy can get stuck in a liquidity trap. Classical theory assumes full employment, while Keynesian theory allows for unemployment.
5. Compare a monetary union with a currency board.
In a monetary union, countries share a currency and a common central bank that can set policy for the whole area. In a currency board, a country still has its own currency but ties it tightly to a foreign currency, with no independent policy. The union is between multiple sovereign states, while a currency board is one country's arrangement. The union allows some collective decision-making, while a currency board is fully automatic. For example, the euro is managed by the ECB, but the Hong Kong currency board just follows the US dollar. Both limit national discretion, but the union offers more flexibility through negotiation.
6. Why might a country choose dollarization instead of a currency board?
Dollarization completely replaces the local currency with a foreign one, while a currency board keeps a local currency but ties it tightly. Dollarization gives even more credibility because the country cannot devalue, but it loses all seigniorage (profit from printing money). A currency board still allows some local notes, but the fixed rate can still be changed if politics demands. Dollarization is harder to reverse, so it is a more extreme commitment. For example, Ecuador adopted the US dollar after a severe crisis to regain trust. A country with very weak institutions may prefer dollarization for maximum stability.
7. Compare Walsh's contract approach with the idea of central bank independence.
Central bank independence means the bank can set policy without political pressure, often to keep inflation low. Walsh's contract adds a direct reward system on top of independence. With independence alone, the bank might still have its own inflation bias if it wants to help the economy. The contract ties the bank's personal payoff to hitting an inflation goal. So independence gives freedom, and the contract gives the right motivation. Without the contract, an independent bank could still cause inflation if it thinks short-term growth is more important. The contract makes sure the bank uses its freedom correctly.
8. What does the Taylor principle say a central bank should do when inflation rises?
The Taylor principle says that when inflation goes up, the central bank should raise its nominal interest rate by more than the increase in inflation. For example, if inflation rises by 1%, the bank should raise rates by more than 1%. This makes the real interest rate (nominal rate minus inflation) go up. A higher real rate slows down spending and borrowing, which helps control inflation. The idea is to stop inflation from getting out of hand. If the bank only raises rates by less than inflation, the real rate would fall and make inflation worse. So the principle is a guideline for keeping the economy stable.
9. How do saving and investment determine the interest rate in the classical view?
In the classical view, saving and investment are like supply and demand for loans. Savers supply funds, and investors demand funds. If people save more, the supply of funds increases. To encourage investors to borrow the extra funds, the interest rate must fall. If firms become more productive and want to invest more, demand for funds rises, pushing interest rates up. The interest rate moves until the amount saved exactly equals the amount invested. This is achieved without any government intervention. Classical economists believed that flexible interest rates always bring saving and investment into balance.
10. Compare the Pigou effect with the Keynes effect. How do they differ in helping an economy recover from a slump?
Both effects start with falling prices, but work through different channels. The Pigou effect works directly: lower prices raise real money holdings, so people spend more on goods. The Keynes effect works through interest rates: lower prices reduce money demand, lowering interest rates, which stimulates investment and spending. The Pigou effect does not rely on investment or interest rate changes; it acts directly on consumption. Also, the Keynes effect may fail if interest rates are near zero (liquidity trap), but the Pigou effect can still work. However, the Pigou effect can be offset by debt deflation.
11. What happens if a central bank does not follow the Taylor principle?
If a central bank does not follow the Taylor principle, inflation can become unstable. When the bank raises nominal rates by less than inflation, the real interest rate falls. A lower real rate encourages more borrowing and spending, which pushes inflation even higher. This can create a cycle where inflation keeps rising. The economy may overheat, leading to very high inflation or hyperinflation. Without the principle, the central bank loses control. For example, in the 1970s some countries saw inflation rise because central banks failed to raise rates enough. So the principle helps avoid such problems.
12. Compare the challenges faced by central banks in emerging markets vs developed countries.
Emerging market central banks often deal with high and unstable inflation, while developed countries usually have low stable inflation. Emerging markets face volatile capital flows that can cause currency crises, whereas developed countries see more stable flows. Weak institutions in emerging markets make policy less effective. Developed countries have deeper financial markets and more credible central banks. For example, a developed central bank can use quantitative easing, but an emerging market might not have the same market depth. Both must fight inflation, but emerging markets have a harder job.