Of course, the prices of all fossil fuels tend to move together, but timing lags among the different types of fossil fuels can give the economy significant adjustment room.

当然，所有矿物燃料的价格通常都会一起波动，但不同种类的矿物燃料在价格变动通常有时间，这给经济调整保留足够调整的空间。

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The essence of such models is the introduction of lags in the adjustment of variables.

这类模型的实质是在变量的调整中引进时间滞后的概念。

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While lags are expected (economists speak of a J-curve effect that accounts for the process of adjustment to the new prices in both countries), a two or three year lag in an era of instant communications, cyberspace transactions, transnational production, and airtight supply chains is simply not credible.

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