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Tuesday, December 16, 2025

How Much Do Tariffs Affect Inflation?

Today’s political discussions can be frustrating and unhelpful, in large part because people disagree about what the “facts” of any subject are, beyond the “normal” problem of post-modern rejection of the notion of any such thing as absolute truth. 


Consider the matter of the impact of tariffs on general rates of inflation. In principle, tariffs can result in a one-time increase in prices, but not inflation (a general rise in prices for all goods and services). 


If there are any facts we might not generally disagree about, it is that inflation pressures exist, and have existed for some time. 


The bulk (80 percent to 90 percent) of total inflationary price increases, especially in key areas such as housing, health care, childcare, food and energy, occurred after 2017, but were caused by non-trade shocks. COVID-19 added 10 percent to 15 percent price increases across the economy by 2022, for example.


Other areas where consumers see higher prices are essentially insulating from tariffs, such as child care and healthcare (70 percent or more of costs are entirely domestic). 


Food and energy imports did face tariffs but were dwarfed by global events. Pandemic meatpacking disruptions in 2020 caused at least a 10 percent spike. ) The avian flu (2022-2023) explains 70 percent of rise in egg and chicken prices.  Also, imported food tariffs affected about five percent of U.S. food supply items.


Sector

Pre-Tariff Increase (2016-2017 to End-2017)

Post-Tariff Increase (End-2017 to End-2024)

Total Increase (2016-2024)

Non-Tariff Drivers

Housing (Shelter CPI)

+3.3%

+29.5%

+33.5%

Driven by low inventory (U.S. built 5M fewer homes than needed post-2008) and rent controls in high-demand areas; tariffs on lumber/steel added ~1-2% at most.

Food (Food at Home CPI)

+0.8%

+26.2%

+27.1%

Pandemic meatpacking disruptions (2020: +10% YoY) and avian flu (2022-2023) explain 70%+ of rise; imported food tariffs minimal (~5% of U.S. supply).

Healthcare (Medical Care CPI)

+2.1%

+22.4%

+24.7%

Prescription drug prices up 15% pre-2018 due to patent protections; hospital consolidations added 5-7% annually. Tariffs irrelevant to domestic services.

Child Care (Avg. Annual Cost)

+3.0% (est. from 2016 baseline ~$10,000)

+31.3% (to $13,128 in 2024)

+34.6%

Post-2020 wage hikes for providers (+25%) and 20% capacity loss from closures; exceeds general CPI by 10+ points, per DOL data. No direct tariff link.

Energy (Overall Energy CPI)

-2.5% (oil price dip)

+28.1%

+25.1%

2022 Ukraine war caused +50% gasoline spike; renewables transition volatility. Pre-2018 shale oversupply kept prices low; tariffs on imported oil negligible.


In sum, in each of these key consumer spending categories, there were other forces driving most of the price increases:  

  • Housing: Chronic underbuilding since the 2008 financial crisis, zoning restrictions, and rising construction material/labor costs fueled by domestic shortages and low interest rates until 2022.

  • Food: Supply chain disruptions (e.g., weather events, labor shortages), the COVID-19 pandemic's lasting effects on processing and transportation, and commodity price volatility from events like the 2022 Ukraine conflict.

  • Healthcare: Aging population demands, regulatory complexities, pharmaceutical pricing dynamics, and insurance market consolidations—issues predating tariffs by decades.

  • Child Care: Labor shortages in the sector (wages rose 20-30% post-2020 to attract workers), pandemic-related closures leading to reduced capacity, and insufficient public subsidies, with costs outpacing general inflation by 7 percentage points from 2020-2024.

  • Energy: Geopolitical tensions (e.g., OPEC decisions pre-2018), the shale boom's volatility, and the 2020-2022 global energy crunch from pandemic recovery and the Russia-Ukraine war—notably, U.S. gasoline prices spiked 50%+ in 2022 before new 2025 tariffs.


Category

Pre-Tariff Increase (2012–2017 Annualized %)

Post-Tariff Increase (2018–Sep 2025 Annualized %)

Key Non-Tariff Drivers

Sources

Housing

+5.2% (FHFA HPI from ~250 to ~320 index)

+6.1% (to ~435 index; +70% cumulative since 2012)

Supply shortages, low rates, zoning

FHFA HPI; FRED USSTHPI

Food

+2.4% (CPI food from ~230 to ~250 index)

+3.8% (to ~290 index; +25% since 2019)

Pandemic disruptions, weather, labor

BLS CPI Food; USDA ERS Outlook

Healthcare

+3.1% (CPI medical care from ~430 to ~480 index)

+3.5% (to ~580 index; +35% since 2010)

Aging population, drug costs, consolidation

BLS CPI Medical Care; US Inflation Calculator

Child Care

+4.1% (Costs up ~25% from ~$9K to ~$11K avg annual/infant)

+5.3% (to ~$15K avg; +67% since 2010)

Provider wages, regulations, demand

EPI Child Care Costs; Living Wage Institute

Energy

+ (-1.2)% (CPI energy volatile, net flat from ~200 to ~195 index)

+2.9% (to ~270 index; +39% since 2019)

Geopolitics, AI demand, grid delays

BLS CPI Energy; BLS CPI Summary


Some point out that only about 20 percent of tariff costs show up in consumer prices, which might still be seen as important, even if the main drivers lie elsewhere:

  • Shelter costs have risen close to 34 percent since 2019, outpacing household income growth by more than 12 percentage points

  • Egg and beef prices are higher, yes. But in most years, ranchers struggle to earn a profit; the cattle herd shrank and we had a drought in 2022

  • Avian flu wiped out millions of hens, quadrupling egg prices overnight

  • Child-care costs have risen 10 points faster than overall inflation, driven by rising wages and shifts in the labor market.


Paradoxically, in the sectors where tariffs are in place (cars, bicycles, and washing machines), prices have risen less than overall inflation because durable goods companies compete fiercely for market share and absorb most of the tariff costs rather than passing them on to consumers. 


Thursday, November 13, 2025

Fear Versus Greed: Electricity Transformed into Value (Bitcoin) and Insights (Inferences)

“Fear and greed” notoriously are drivers of equity market sentiment and that is clear in the yo-yo behavior surrounding artificial intelligence equities recently. The fear is that AI investment levels are a bubble, overinvestment that will ultimately not pay off. 


The greed flows from the belief that AI is a transformative new technology that will create new winners and losers in the broader economy. 


A likely third position is that AI is not a bubble on the order of the do-com mania, but will produce excess investment that has to be rationalized, eventually, as all great new technology waves have done so. 


Optimists might agree with Mara Holdings CEO Frederick Thiel that “ electrons are the new oil,” referring to the idea that computational resources underlie the ability to wring value from AI, while the data centers that provide the computation now are dependent on access to large and affordable amounts of electricity. 


Mara believes future winners will be high-performance compute providers who have the lowest costs to produce insight per token; insight per kilowatt of power consumed, especially for enterprise private compute operations. 


As Thiel puts it, his firm, which originally ran bitcoin mining operations, now provides a high-performance computing infrastructure  that converts energy into both value (bitcoins) and intelligence (AI computing).


The broader vision for the company, as is true for many other former bitcoin miners, is "transforming energy into intelligence.” In other words, consuming electricity to power AI models and the inferences to be drawn from using those models. 


The analogy is not unlike that sometimes made to the export of alfalfa from the U.S. great plains to the Middle East. The production of the alfalfa consumes water, which becomes livestock food, which essentially also represents the value of the water consumed to grow the produce. So exporting alfalfa also is akin to exporting the water used to grow it. 


“We believe energy, not compute, really becomes the primary constraint on AI growth,” says Thiel. 


Pursuant to that belief, Mara has a venture with MPLX, formed by Marathon Petroleum Corporation, the largest petroleum refinery operator in the United States, to develop and operate multiple integrated power generation facilities and state-of-the-art data center campuses in West Texas. 


MPLX will provide long-term access to lower-cost natural gas at scale, while Mara will develop and operate on-site power generation and compute infrastructure. 


The initial capacity is expected to reach 400 megawatts with the option to expand to up to 1.5 gigawatts across three plant sites.


But Mara also is basing its business on “inference” rather than model training, as that allows it to use application specific integrated circuits (ASICs) rather than graphics processor units (GPUs), thus lowering its capital investment. 


That approach also enables use of smaller data centers and air cooling rather than the more-expensive liquid cooling. The strategy is not especially new, as others in the data center and connectivity spaces have chosen to become specialists in smaller markets (either in terms of geography or types of customers). 


But all that happens within the context of a market that is volatile. 


A positive development such as a new chip announcement, a major partnership like the AWS/OpenAI compute services deal, or strong earnings from an AI leader pushes the market into "extreme greed" territory, driving up prices quickly.


But then reports of high AI capital expenditure, delayed profitability for end-users, or a general sentiment survey warning of a "bubble" causes profit-taking and selling, plunging the market into "fear" sentiment, leading to sharp, temporary pullbacks.



Month

Major Event

Sentiment

Notable Impact

2025-01

DeepSeek Launch

Fear

Sharp drop, infrastructure risk flagged

2025-04

Trump Tariffs Threat

Fear

Market volatility spiked, quick rebound after walkback

2025-09

NVIDIA-OpenAI Chip Deal, Fed Rate Cut

Greed

Strong surge, positive sentiment returned

2025-10

Bubble Talk Surge

Fear

Renewed caution, market exhaustion warnings


The cycle resets because the fundamental belief in AI's future remains generally strong. Investors who sold out of fear often rush back in for fear of missing the next leg up (greed), making the dips short-lived and creating the current high-volatility, upward-trending cycle. 


But skepticism and hope continue to coexist and oscillate. 


Beyond the volatility, we might argue that “high-performance computing capability” has become a strategic commodity.


High-performance compute capacity arguably has become the single most critical, scarce, and expensive strategic resource in the AI industry. 


If so, long-term, multi-billion-dollar compute contracts are now a competitive necessity, resembling procurement models for essential commodities like energy or raw materials. But volatility will persist until some future time when there is much more predictability about AI investments and revenue gains. 


So nobody knows yet whether the investment boom in artificial intelligence we now see is a bubble, or not. Much conventional wisdom seems to suggest AI is a bubble, but there is disagreement. 


And if some argue it is a bubble, there remains an argument that there is a significant difference between a dot-com style bubble and an “ordinary” investment bubble associated with introduction of any major new technology


To be sure, for some of us, there are hints to parallels of excesses akin to the excessive dot-com investment at the turn of the century. As I was writing one startup business plan, I was told “there’s plenty of money, make it bigger.” 


As it turned out, “this time is different” and admonitions that some of us “did not get it” were wrong. Economics was not different and normal business logic was not suspended. 


But some might note that there are important differences between AI investment and dot-com startup investment. Back then, many bets were placed on small firms with no actual revenue. 


Today, it is the cash flow rich, profitable hyperscalers that dominate much of the activity. Investment burdens are real, but so are immense cash flows and profits to support that investment. 


And by some financial metrics, valuations do not seem as stretched as they were in the dot-com era, though everyone agrees equity market valuations are high, at the moment. 



We also can’t tell yet what impact artificial intelligence might have on productivity and economic growth, much less future revenues for industries and firms. 


And that might be crucial to the argument that there actually is not an investment bubble; that there are real financial and economic upsides to be reaped; new products and industries to be created. 


There is some thinking by economists that AI impact could be greater than electricity and at least as important and positive as information technology in general. 


General-Purpose Technology

Primary Timeframe of Peak Impact

Estimated Annual Productivity Boost (Peak Rate)

Macro-Level Impact Metric

Steam Engine

Mid-19th Century (Decades after invention)

0.2% - 0.3%

Contribution to annual TFP* or Labor Productivity Growth

Electrification

1920s - 1940s (30+ years after initial adoption)

~0.4% - 0.5%

Contribution to annual TFP or Labor Productivity Growth

Information Technology (IT) / Computers

Mid-1990s - Early 2000s

~1.0% - 1.5%

Acceleration in annual Labor Productivity Growth (U.S.)

Artificial Intelligence (AI) (Current Forecasts)

Early 2030s (7–15 years after GenAI breakthrough)

1.0% - 1.5%

Projected increase in annual Labor Productivity Growth over 10 years



Study/Source

Projection Focus

Estimated Gain (Over Baseline)

Caveats

Goldman Sachs (2023)

Macroeconomic Forecast (Global/U.S.)

7% increase in Global GDP over 10 years; 1.5 ppt annual U.S. labor productivity growth 

Highly optimistic, assuming rapid adoption and task automation.

McKinsey Global Institute (2023)

Economic Potential of Generative AI 

$2.6 to $4.4 Trillion added annually to the global economy.

Based on value from 63 specific use cases across business functions.

Acemoglu (MIT)

Conservative Macroeconomic Model

0.7% increase in TFP  over 10 years (U.S. economy).

More modest, based on historical adoption rates and cost-benefit analysis of task automation.

Brynjolfsson et al. (Micro Studies)

Firm/Task-Level Productivity

10% - 40% increase in productivity for tasks like coding, customer service, and professional writing.

These are early, firm-level gains, which historically take time to translate into aggregate macro statistics.


Each of us has to make a call: bubble or not; big bubble or only “normal” overinvestment?


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