If hiring that worker brings in more marginal revenue than marginal cost, then, congratulations!

如果雇佣工人带来边际收益于边际成本，那么恭喜！

Now, this specialization decreases the the marginal cost of each pizza.

这种专业化减少了每个披萨边际成本。

Now, the marginal cost of that last pizza is huge.

此时，最后一个披萨边际成本是巨。

Since the marginal cost of creating virtual items is zero, they are very profitable for developers.

由于创建虚拟项目边际成本为零，因此对开发人员来说是非常有利可图。

Eventually, the marginal benefit of another park will be less than the marginal cost, so they stop building parks.

最终，总有一座公园边际效益会小于边际成本，于是他们停止建造公园。

Notice in this example the marginal cost is increasing.

注意，这个例子中，边际成本一直。

If the marginal cost of next pizza is 9 dollars then you should produce that pizza too.

如果下一个披萨边际成本是9美元，那么你也应该生产它。

It turns out that supply curves are really just marginal cost curves.

事实证明，供给曲线实际上就是边际成本曲线。

But if the marginal cost of the next pizza is 12 dollars, you shouldn't make it.

但如果下一个批萨边际成本是12美元，你就不应该生产它了。

Suppliers bid according to how much it would cost to provide an extra unit of power, known as its marginal cost.

供应商根据提供额外单位电力成本（即边际成本）进行投标。

Equilibrium is efficient because the marginal benefit of the last unit consumed equals the marginal cost of that unit.

均衡点最有效率，因为最后一个单位边际效益等于这个单位边际成本。

So the first price auction is a classic tradeoff, marginal benefit and marginal cost.

因此，首价拍卖是一种典权衡，即边际收益与边际成本之间取舍。

The marginal cost is you'll get less surplus if you win.

边际成本于，如果你赢了，你将获得剩余价值会减少。

I think you should almost assume that the marginal cost is zero.

我认为你几乎可以假定边际成本为零。

The marginal cost for the next kilowatt-hour is zero.

下一个千瓦时边际成本为零。

So Russia can still export at 60, its above marginal cost.

因此，俄罗斯仍能以60美元价格出口，这一价格高于其边际成本。

And the thing underpinning it all is the software itself has zero marginal costs.

其背后关键于，软件本身具有零边际成本特性。

Now this is marginal cost or above so this is the best response.

现这是边际成本或以上，所以这是最好反应。

In particular, we find that prices in the market are equal to marginal cost.

具体来说，我们发现市场价格等于边际成本。

That's where the marginal cost and the demand thing, demand lines intersect.

学生：这就是边际成本和需求、需求线相交之处。