Category: Essential Economics for Business: Ch 07

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Investment set to fall as business is baffled by Trump

Economic growth is closely linked to investment. In the short term, there is a demand-side effect: higher investment, by increasing aggregate demand, creates a multiplier effect. GDP rises and unemployment falls. Over the longer term, higher net investment causes a supply-side effect: industrial capacity and potential output rise. This will be from both the greater quantity of capital and, if new investment incorporates superior technology, from a greater productivity of capital.

One of the biggest determinants of investment is certainty about the future: certainty allows businesses to plan investment. Uncertainty, by contrast, is likely to dampen investment. Investment is for future output and if the future is unknown, why undertake costly investment? After all, the cost of investment is generally recouped over several months or year, not immediately. Uncertainty thus increases the risks of investment.

There is currently great uncertainty in the USA and its trading partners. The frequent changes in policy by President Trump are causing a fall in confidence and consequently a fall in investment. The past few weeks have seen large cuts in US government expenditure as his administration seeks to dismantle the current structure of government. The businesses supplying federal agencies thus face great uncertainty about future contracts. Laid-off workers will be forced to cut their spending, which will have knock-on effect on business, who will cut employment and investment as the multiplier and accelerator work through.

There are also worries that the economic chaos caused by President Trump’s frequent policy changes will cause inflation to rise. Higher inflation will prompt the Federal Reserve to raise interest rates. This, in turn, will increase the cost of borrowing for investment.

Tariff uncertainty

Perhaps the biggest uncertainty for business concerns the imposition of tariffs. Many US businesses rely on imports of raw materials, components, equipment, etc. Imposing tariffs on imports raises business costs. But this will vary from firm to firm, depending on the proportion of their inputs that are imported. And even when the inputs are from other US companies, those companies may rely on imports and thus be forced to raise prices to their customers. And if, in retaliation, other countries impose tariffs on US goods, this will affect US exporters and discourage them from investing.

For many multinational companies, whether based in the USA or elsewhere, supply chains involve many countries. New tariffs will force them to rethink which suppliers to use and where to locate production. The resulting uncertainty can cause them to delay or cancel investments.

Uncertainty has also been caused by the frequent changes in the planned level of tariffs. With the Trump administration using tariffs as a threat to get trading partners to change policy, the threatened tariff rates have varied depending on how trading partners have responded. There has also been uncertainty on just how the tariff policy will be implemented, making it more difficult for businesses to estimate the effect on them.

Then there are serious issues for the longer term. Other countries will be less willing to sign trade deals with the USA if they will not be honoured. Countries may increasingly look to diverting trade from the USA to other countries.

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Articles

Data

Questions

  1. Find out what tariffs have been proposed, imposed and changed since Donald Trump came to office on 20 January 2025.
  2. In what scenario might US investment be stimulated by Donald Trump’s policies?
  3. What countries’ economies have gained or are set to gain from Donald Trump’s policies?
  4. What is the USMCA agreement? Do Donald Trump’s policies break this agreement?
  5. Find out and explain what has happened to the US stock market since January 2025. How do share prices affect business investment?
  6. Which sector’s shares have risen and which have fallen?
  7. Using the Data link above, find out what has been happening to the US Policy Uncertainty Index since Donald Trump was elected and explain particular spikes in the index. Is this mirrored in the global Policy Uncertainty Index?
  8. Are changes in the Policy Uncertainty Index mirrored in the World Uncertainty Index (WUI) and the CBOE Volatility Index: VIX?
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How cross-border electricity trade can supercharge Africa’s energy transition

Africa’s energy transition is at a pivotal moment. While the continent boasts abundant renewable energy resources, its electricity generation and distribution remain fragmented. Cross-border electricity trade has emerged as a potential game-changer, fostering energy security, reducing costs, and accelerating the adoption of renewables. However, is Africa fully leveraging this opportunity?

In a forthcoming paper in the Energy & Environment journal, I join forces with my colleagues Mercy Adaji and Bereket Kebede to argue that the answer to this question is no. Our study examines the impact of cross-border electricity trade in renewable electricity generation across 21 African countries over a 24-year period (1996–2020). Our findings indicate that a 1% increase in electricity trade significantly raises the share of renewables in total electricity output by approximately 0.05%. This underscores the crucial role of regional integration in advancing Africa’s clean energy goals, aligning with previous studies (e.g., Boz et al., 2021; Song et al., 2022, linked below) that highlight how electricity market integration promotes renewable energy investments by stabilising supply and mitigating intermittency risks.

Despite these advantages, cross-border electricity trade remains significantly underutilised due to regulatory barriers, inadequate infrastructure, and governance challenges.

Net electricity-importing countries tend to benefit more from trade, while net-exporting nations, particularly those reliant on fossil fuels, exhibit weaker positive impacts. Without targeted policies (such as carbon pricing and green subsidies) trade disparities may persist, slowing the transition to clean energy.

Moreover, our results highlight the pivotal role of governance in fostering a robust electricity market. This is neither surprising nor new – quality of governance matters over the long term in all aspects of economic activity. Agostini et al. (2019), for instance, show that well-structured regulations and strategic investments in interconnections enhance the effectiveness of cross-border electricity trade. Transparent regulatory frameworks, expanded grid interconnections, and harmonised energy policies can significantly boost the impact of regional electricity trade.

By strengthening collaboration, African nations can mitigate energy poverty, enhance supply reliability, and accelerate the shift toward a greener future.

To capitalise fully on cross-border electricity trade, African policymakers must prioritise regional energy integration, invest in infrastructure and implement incentives to spur renewable energy expansion. With the right policies and co-operative strategies, Africa can harness its vast renewable potential and achieve a more sustainable, energy-secure future.

Articles

Questions

  1. How does electricity trade help mitigate the intermittency challenges of renewable energy, and what mechanisms could further enhance its effectiveness?
  2. The study highlights governance quality as a crucial factor in the success of cross-border electricity trade. What governance-related challenges do African countries face in implementing a unified electricity market, and how can policymakers address them to maximize trade benefits?
  3. Our results show that net electricity-importing countries tend to gain more from trade than net-exporting ones, particularly those relying on fossil fuels. What policy measures can be introduced to ensure that net-exporting countries also benefit from electricity trade while advancing renewable energy integration?
  4. What are the most critical infrastructure and policy gaps that hinder the growth of cross-border electricity trade in Africa, and how can these be overcome to facilitate a more sustainable energy transition?
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Why are Tesla sales plummeting?

Tesla sales have fallen dramatically recently. In Europe they were down 47.7% in January 2025 compared with January 2024. In Spain the figure was 75.4%, in France 63.4%, in Germany 59.5%, in Sweden 44.3%, in Norway 37.9%, in the UK 18.2% and in Italy 13.4%. And it was not just Europe. In Australia the figure was 33.2%, in China 15.5% and in California 11.6%. Meanwhile, Tesla’s share price has fallen from a peak of $480 on 17 December 2024 to $338 on 21 February 2025, although that compares with $192 in February 2024.

So why have Tesla sales fallen? It’s not because of a rise in price (a movement up the demand curve); indeed, Tesla cut its prices in 2024. Part of the reason is on the supply side. In several countries, stocks of Teslas are low. Some consumers who would have bought have had to wait. However, the main reason is that the demand curve has shifted to the left. So why has this happened?

A reaction to Elon Musk?

One explanation is a growing unpopularity of Elon Musk among many potential purchasers of electric vehicles (EVs). People are more likely to buy an EV if they are environmentally concerned and thus more likely to be Green voters or on the political left and centre. Elon Musk, by supporting Donald Trump and now a major player in the Trump administration, is seen as having a very different perspective. Trump’s mantra of ‘drill, baby drill’ and his announced withdrawal from the Paris agreement and the interventions of Trump, Vance and Musk in European politics have alienated many potential purchasers of new Teslas. Elon Musk has been a vocal supporter of the right-wing Alternative for Germany (AfD) party, describing the party as the ‘last spark of hope for this country’ (see BBC article linked below).

There has been outspoken criticism of Musk in the media and the Financial Times reports existing owners of Teslas, who are keen to distance themselves from Musk, ordering stickers for their cars which read ‘I bought this before Elon went crazy’. In a survey by Electrifying.com, 59% of UK potential EV buyers stated that Musk’s reputation put them off buying a Tesla.

Other reasons for a leftward shift in the demand for Teslas

But is it just the ‘Musk factor’ that has caused a fall in demand? It is useful to look at the general determinants of demand and see how each might have affected the demand for Teslas.

The price, number, quality and availability of substitutes  Tesla faces competition, not only from long-established car companies, such as Ford, VW, Volvo/Polestar, Seat/Cupra and Toyota, moving into the EV market, but also from Chinese companies, such as BYD and NIO. These are competing in all segments of the EV market and competition is constantly increasing. Some of these companies are competing strongly with Tesla in terms of price; others in terms of quality, style and imaginative features. The sheer number of competitor models has grown rapidly. For some consumers, Teslas now seem dated compared with competitors.

The price and availability of complements.  The most relevant complement here is electrical charging points. As Teslas can be charged using both Tesla and non-Tesla charging points, there is no problem of compatibility. The main issue is the general one for all EVs and that is how to achieve range conveniently. The fewer the charging points and more widely disbursed they are, the more people will be put off buying an EV, especially if they are not able to have a charging point at home. Clearly, the greater the range of a model (i.e. the distance that can be travelled on a full battery), the less the problem. Teslas have a relatively high range compared with most (but not all) other makes and so this is unlikely to account for the recent fall in demand, especially relative to other makes.

Expectations.  The current best-selling Tesla EV is the Model Y. This model is being relaunched in a very different version, as are other Tesla models. Consumers may prefer to wait until the new models become available. In the meantime, demand would be expected to fall.

Conclusions

As we have seen, there have been a number of factors adversely affecting Tesla sales. Growing competition is a major factor. Nevertheless, the increasing gap politically between Elon Musk and many EV consumers is a major factor – a factor that is likely to grow in significance if Musk’s role in the Trump administration continues to be one of hostility towards the liberal establishment and in favour of the hard right.

Articles

Questions

  1. Why have BYD EV sales risen so rapidly?
  2. If people feel strongly about a product on political or ethical grounds, how is that likely to affect their price elasticity of demand for the product?
  3. Find out how Tesla shareholders are reacting to Elon Musk’s behaviour.
  4. Find out how Tesla sales have changed among (a) Democratic voters and (b) Republican voters in the USA. How would you explain these trends?
  5. Identify some products that you would or would not buy on ethical grounds. How carefully have you researched these products?
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‘Tariff is the most beautiful word.’ Not for economists!

In an interview with Joe Rogan for his podcast, The Joe Rogan Experience, just before the US election, Donald Trump stated that, “To me, the most beautiful word – and I’ve said this for the last couple of weeks – in the dictionary today and any is the word ‘tariff’. It’s more beautiful than love; it’s more beautiful than anything. It’s the most beautiful word. This country can become rich with the use, the proper use of tariffs.”

President-elect Trump has stated that he will impose tariffs on imports of 10% or 20%, with 60% and 100% tariffs on imports from China and Mexico, respectively. This protection for US industries, combined with lighter regulation, will, he claims, provide a stimulus to the economy and help create jobs. The revenues will also help to reduce America’s budget deficit.

But it is not that straightforward.

Problems with tariffs for the USA

Imposing tariffs is likely to reduce international trade. But international trade brings net benefits, which are distributed between the participants according to the terms of trade. This is the law of comparative advantage.

In the simple two-country case, the law states that, provided the opportunity costs of producing various goods differ between the two countries, both of them can gain from mutual trade if they specialise in producing (and exporting) those goods that have relatively low opportunity costs compared with the other country. The total production and consumption of the two countries will be higher.

So if the USA has a comparative advantage in various manufactured products and a trading partner has a comparative advantage in tropical food products, such as coffee or bananas, both can gain by specialisation and trade.

If tariffs are imposed and trade is thereby reduced between the USA and its trading partners, there will be a net loss, as production will switch from lower-cost production to higher-cost production. The higher costs of less efficient production in the USA will lead to higher prices for those goods than if they were imported.

At the same time, goods that are still imported will be more expensive as the price will include the tariff. Some of this may be borne by the importer, meaning that only part of the tariff is passed on to the consumer. The incidence of the tariff between consumer and importer will depend on price elasticities of demand and supply. Nevertheless, imports will still be more expensive, allowing the domestically-produced substitutes to rise in price too, albeit probably by not so much. According to work by Kimberly Clausing and Mary E Lovely for the Peterson Institute (see link in Articles below), Trump’s proposals to raise tariffs would cost the typical American household over $2600 a year.

The net effect will be a rise in inflation – at least temporarily. Yet one of Donald Trump’s pledges is to reduce inflation. Higher inflation will, in turn, encourage the Fed to raise interest rates, which will dampen investment and economic growth.

Donald Trump tends to behave transactionally rather than ideologically. He is probably hoping that a rapid introduction of tariffs will then give the USA a strong bargaining position with foreign countries to trade more fairly. He is also hoping that protecting US industries by the use of tariffs, especially when coupled with deregulation, will encourage greater investment and thereby faster growth.

Much will depend on how other countries respond. If they respond by raising tariffs on US exports, any gain to industries from protection from imports will be offset by a loss to exporters.

A trade war, with higher tariffs, will lead to a net loss in global GDP. It is a negative sum game. In such a ‘game’, it is possible for one ‘player’ (country) to gain, but the loss to the other players (countries) will be greater than that gain.

Donald Trump is hoping that by ‘winning’ such a game, the USA could still come out better off. But the gain from higher investment, output and employment in the protected industries would have to outweigh the losses to exporting industries and from higher import prices.

The first Trump administration (2017–21), as part of its ‘America First’ programme, imposed large-scale tariffs on Chinese imports and on steel and aluminium from across the world. There was wide-scale retaliation by other countries with tariffs imposed on a range of US exports. There was a net loss to world income, including US GDP.

Problems with US tariffs for the rest of the world

The imposition of tariffs by the USA will have considerable effects on other countries. The higher the tariffs and the more that countries rely on exports to the USA, the bigger will the effect be. China and Mexico are likely to be the biggest losers as they face the highest tariffs and the USA is a major customer. In 2023, US imports from China were worth $427bn, while US exports to China were worth just $148bn – only 34.6% of the value of imports. The percentage is estimated to be even lower for 2024 at around 32%. In 2023, China’s exports to the USA accounted for 12.6% of its total exports; Mexico’s exports to the USA accounted for 82.7% of its total exports.

It is possible that higher tariffs could be extended beyond China to other Asian countries, such as Vietnam, South Korea, Taiwan, India and Indonesia. These countries typically run trade surpluses with the USA. Also, many of the products from these countries include Chinese components.

As far as the UK is concerned, the proposed tariffs would cause significant falls in trade. According to research by Nicolò Tamberi at the University of Sussex (see link below in Articles):

The UK’s exports to the world could fall by £22 billion (–2.6%) and imports by £1.4 (–0.16%), with significant variations across sectors. Some sectors, like fishing and petroleum, are particularly hard-hit due to their high sensitivity to tariff changes, while others, such as textiles, benefit from trade diversion as the US shifts demand away from China.

Other badly affected sectors would include mining, pharmaceuticals, finance and insurance, and business services. The overall effect, according to the research, would be to reduce UK output by just under 1%.

Countries are likely to respond to US tariffs by imposing their own tariffs on US imports. World Trade Organization rules permit the use of retaliatory tariffs equivalent to those imposed by the USA. The more aggressive the resulting trade war, the bigger would be the fall in world trade and GDP.

The EU is planning to negotiate with Trump to avoid a trade war, but officials are preparing the details of retaliatory measures should the future Trump administration impose the threatened tariffs. The EU response is likely to be strong.

Articles

Questions

  1. Explain why, according to the law of comparative advantage, all countries can gain from trade.
  2. In what ways may the imposition of tariffs benefit particular sections of an economy?
  3. Is it in countries’ interests to retaliate if the USA imposes tariffs on their exports to the USA?
  4. Why is a trade war a ‘negative sum game’?
  5. Should the UK align with the EU in resisting President-elect Trump’s trade policy or should it seek independently to make a free-trade deal with the USA? is it possible to do both?
  6. What should China do in response to US threats to impose tariffs of 60% or more on Chinese imports to the USA?