在需求弹性不变的情况下，边际收益是多少？
2 (Exercise) For the case of constant elasticity of demand, what is marginal revenue?
艺电重申，其对2012财年每股收益的预期保持不变，为70-90美分，全年的营收预期则从原来的38亿美元调高至40.25亿美元，华尔街给出的数字是39亿美元。
The company affirmed its previous FY 2012 forecast for non-GAAP profits of 70-90 cents a share, and now expects revenue of $3.8 billion to $4.025 billion. Street consensus is for $3.9 billion.
收益也不是一成不变的 ：对于易腐烂商品来说，买一送一或买二送一的交易没有听装食品来着实惠。
The benefits vary: BOGOF or three-for-the-price-of-two deals are less valuable for perishable foods than for tinned goods.
但日本央行维持利率不变的事实有助于保持平滑的收益率曲线以及与美国之间较大的利差，这反过来会使日元对美元进一步走弱。
But the fact that the BoJ is pinning rates is helping to maintain a flat yield curve and wide spread with US rates, which in turn weakens the yen against the dollar.
为达到销售收益增加的目的，在其他条件不变的情况下，价格调节本身必须在一定的范围内进行。
For increasing the sales income, the price adjustment itself must be proceed in certain dimension in terms of other conditions unchanged.
在技术水平和其他要素的投入不变的情况下，边际收益是先递增后递减。
With the technological and other key elements remaining the same, their marginal income is increasing first and then decreasing gradually.
其收益会因总量的变化按比例的减少，但其它的商业条款保持不变。
Income will decrease proportionally to the volume change, but other commercial terms and conditions will remain unchanged.
如果价值成本不变，则应采取收益最大的要素组合。
But if the cost of the value stays unchanged, the combinatorial factors of the overhead profit should be considered.
假设该企业价值不变，因为债务还清，价值回归股东，从而产生股权收益。
Assuming the enterprise value remains unchanged, as debt is repaid, value reverts to the equity holders, thereby.
因此，如果股份上涨而股息不变，收益就下跌。
So if the share price rises and the dividend does not, then the yield falls.
现代增长理论主要是建立在模型不变或增加收益的基础上，最重现性的因素是知识的累积。
Modern growth theory is largely built on models with constant or increasing returns to reproducible factors as a result of the accumulation of knowledge.
由此，一直延续不变的要素边际收益递减规律受到了强烈的冲击，要素边际收益递增成为现实。
Therefore, the reduced law of marginal profit of elements has been strongly influenced and the progressive increase in marginal profit has become a reality.
在其他条件不变时，收益率曲线越陡峭，CBA越大；
Other things being equal, the more upward-sloping the slope of the yield curve, the greater the CBA;
在其他条件不变时，收益率曲线越陡峭，CBA越大；
Other things being equal, the more upward-sloping the slope of the yield curve, the greater the CBA;
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