Before the midterm elections, the buildout of AI data centers received a lot of attention and was identified as being a significant factor contributing to strong economic growth; at the same time, there were mounting worries of overinvestment and related excess indebtedness. Post midterm elections, significant discussion has turned to the downside: if newly-elected state legislatures and regulators clamp down on the AI data center buildout, commentators now fear there will be significant damage to the economy.
My assessment is the AI buildout has added to the economy--although its net impact on GDP has been relatively small--and a clampdown on the AI data center buildout would dent intermediate-term economic performance, but have a relatively modest impact on GDP growth. There are reasons to be optimistic. Here's some observations to support this view.
Consumption has consistently been the biggest contributor to economic growth. Consumption comprises roughly 67% of GDP, and in the last several years, its growth has contributed approximately 1.8 percentage points to the average 2.7% annualized growth in real GDP. Business fixed investment has also been strong, driven by the boom in AI data center build outs (Chart 1). The BFI share of GDP has risen to 17%, its highest since the early 1980s, and 10% of business investment is attributable to investment in AI. That means AI investment is roughly 1.7% of GDP.


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