# An Economics Question

To all the MBA and Economics types out there, I have one simple question. For some of us to be wealthy, is it necessary to keep some others poor?

I asked an economists (或者更确切地说，, an economics major) this question. I don’t quite remember her answer. It was a long time ago, and it was a party. May be I was drunk. I do remember her saying something about an ice cream factory in an isolated island. I guess the answer was that all of us could get richer at the same time. But I wonder now…

Inequality has become a feature of modern economy. May be it was a feature of ancient economies as well, and we probably never had it any better. But modern globalization has made each of us much more complicit in the inequality. Every dollar I put in my savings or retirement account ends up in some huge financial transaction somewhere, at times even adding to the food scarcity. Every time I pump gas or turn on a light, I add a bit to the cruel inequality we see around us.

At least these were my thoughts when I was watching heartrending scenes of tiny emaciated Congolese children braving batons and stone walls for a paltry helping of high energy biscuits. Sitting in my air-conditioned room, voicing my righteous rage over their tragic plight, I wonder… Am I innocent of their misfortunes? Are you?

# 商品价格 — 谁在拿着卡?

#### 投机

 图 1. 在美元和其波动性散点图的WTI现货价格. 虽然图中显示的随机簇在低处的水平, 在价格＆gt; \$75 (在紫色框中突出), 似乎存在与显著相关的结构.

 图 2. 在WTI现货价格在美元和欧元的时间演化. 欧元的价格看起来更稳定.

 图 3. 在美元和欧元衡量WTI波幅. 它们几乎是相同的.
 图 4. 散点图WTI的波动性在美元和欧元. 过剩以上人口等于波动的分界线意味着，当欧元测量的WTI现货的波动性更大.

#### 参考和尾

[1] 杰弗里·柯里等人. “旧政治的复仇’ 经济” 商品 (高盛商品研究), 三月 14, 2008.
$sigma (t) = sqrt {frac{1}{{31}}sumlimits_{t - 15}^{t + 15} {left( {ln left[ {frac{{S(t)}}{{S(t - 1)}}} right] - mu } right)^2 frac{{252}}{{31}}} }$