Deflation just doesn’t happen in a bubble though.
From my understanding the primary lever that can be pulled for this is the Fed interest rate. With a high interest rates you’re trying to decrease the amount of money institutions spend and rather increase the amount that they invest/save. As it becomes easier to make money by buying bonds than by reinvesting into your business. This in effect removes money from the economy.
The problem here is this means businesses also spend less on salaries, thus triggering layoffs. This then also has a downward pressure on inflation as the working class ends of being layed off as unemployment rises. This puts more and more pressure on businesses to cut costs as more and more people have less disposable income to spend.
This is the downward spiral that’s being referred to here.
In effect you can’t create defationary policies without causing high unemployment, at least in a capitalist society.
Take a look at the history of the Great Depression and the New Deal that helped the U.S. get out of it. Effectively the government had to create jobs to stimulate the economy as businesses couldn’t or wouldn’t shoulder that cost but the government could. As disposable income rose, so did spending and in turn inflation turned positive again as unemployment fell.
It’s worse than that. As the other comment said, it’s the consumer who pays the tarrif but let’s assume today:
Let’s then assume that for all 3 countries 25% of the cost is the raw Nickel that goes into the battery. Let’s also assume that it’s a flat 20% tariffs across the board.
Now your prices become:
Increase it to a 60% tariff:
So no matter what, prices go up even for the US manufacturer as they still have to import raw materials. The tariffs end up making local manufacturing more competitive with overseas at the cost of the consumer. As consumers just saw the price of batteries go from $4.00 to $5.75, a whopping 43% increase. Yay inflation!
The original idea behind tarrifs are just that… To give local businesses a competitive advantage while they catch up to overseas products. Once the US company is established you can then drop the tariff as they no longer need help while they ramp up manufacturing.
So maybe the US manufacturer costs might go down, if they’re able to make more at scale, but they still have to beat the automatic 75c increase because of their own imports. And all of that is still assuming that the tariff is large enough to make the US company the cheapest option. Otherwise it may end up backfiring and cause less sales as consumers end up not paying the increased costs. As you can see above with only a 20% tariff.