【latex版】水贴

Arrests follow plan to introduce anti-terrorism law that threatens press freedom

Four journalists have been arrested in Egypt over the past week, adding to 18 journalists already imprisoned, according to a survey conducted by the Committee to Protect Journalists (CPJ) on 1 June.

CPJ reports that Wagdy Khaled, a photographer for the weekly newspaper Al-Masriya, was arrested on Friday while taking photographs outside a Cairo mosque. He is being held on suspicion of belonging to the banned Muslim Brotherhood.

Telly addict Andrew Collins reviews the week's TV. He waves a solemn goodbye to the Clarkson/Hammond/May model of Top Gear on BBC2; assesses the end of the sixth season of The Good Wife on More4; wonders how stupid the makers of Homeland-alike thriller Odyssey thinks we are as it is imported by BBC2; and goes back to his hometown Northampton (or not) in new office comedy Not Safe For Work.

We develop a strategic theory of counterfeiting as a multi-market large game. Bad guys choose whether to counterfeit, and what quality to produce. Opposing them is a continuum of good guys who select a costly verification effort. In equilibrium, counterfeiters produce better quality at higher notes, but verifiers try sufficiently harder that verification still improves. We develop a graphical framework for deducing comparative statics. Passed and counterfeiting rates vanish for low and high notes. Our predictions are consistent with time series and cross-sectional patterns in a unique data set assembled largely from the Secret Service.

Harsanyi (1974) criticized the von Neumann–Morgenstern (vNM) stable set for its presumption that coalitions are myopic about their prospects. He proposed a new dominance relation incorporating farsightedness, but retained another feature of the stable set: that a coalition S can impose any imputation as long as its restriction to S is feasible for it. This implicitly gives an objecting coalition complete power to arrange the payoffs of players elsewhere, which is clearly unsatisfactory. While this assumption is largely innocuous for myopic dominance, it is of crucial significance for its farsighted counterpart. Our modification of the Harsanyi set respects “coalitional sovereignty.” The resulting farsighted stable set is very different from both the Harsanyi and the vNM sets. We provide a necessary and sufficient condition for the existence of a farsighted stable set containing just a single-payoff allocation. This condition roughly establishes an equivalence between core allocations and the union of allocations over all single-payoff farsighted stable sets. We then conduct a comprehensive analysis of the existence and structure of farsighted stable sets in simple games. This last exercise throws light on both single-payoff and multi-payoff stable sets, and suggests that they do not coexist.

Levy (2013) presented examples of discounted stochastic games that do not have stationary equilibria. The second named author has pointed out that one of these examples is incorrect. In addition to describing the details of this error, this note presents a new example by the first named author that succeeds in demonstrating that discounted stochastic games with absolutely continuous transitions can fail to have stationary equilibria.

三星刚刚公布了他们预计的 2015 年 Q2 财报成绩，重点是预期盈利会比去年同期下降 4%，只有 61 亿美元，收入亦比去年同期下降 8.4%。分析指三星有此成绩的原因是，旗下最新旗舰手机（Galaxy S6 / S6 Edge）销量未能达标，不过其实不是因为不好卖，而是需求太高但生产步伐追不上。华尔街日报的线人指出三星原先预计每卖出四部 S6 才会卖出一部 S6 Edge，现实的需求却是两款手机需求相近。此外，消息指三星的零件生产业务却继续保持强劲，可分担手机业务方面的损失。...

觉得家里桌机的 SSD 有点不够用？不妨看看三星新推出的 2TB 版 850 Evo 和 850 Pro。这两款产品在保持 SSD 高速特性的同时，也兼顾到了尺寸跟容量方面的需求，至于价格，则分别是 800 美元（约人民币 4,930 元）和 1,000 美元（约人民币 6,170 元）。以订价来说，新货显然是不会太便宜，但追求「小身材大味道」的朋友，还是可以将其列为备选啰。.

觉得手上的笔记本还不够轻薄？随着 LG 新款触控屏幕的问世，今年晚些时候，说不定你就能用上更加称心的产品了。据悉他们这次新推出的 1080p 屏幕是基于 AIT（Advanced In-Cell Touch）技术，用内建在 LCD 里面的触控感应器取代了触控面板层，从而达到相较普通触控屏幕减少 25 重量的效果。 实际上，类似的技术在 G4 上也有出现，但运用到笔记本之上，这还是头一回。除了让设备变得更轻薄外，它还能降低光反射，令显示器变得更亮更清晰。据悉 LG 计划为厂商提供多种尺寸选择，而...

There are many R time series tutorials floating around on the web this post is not designed to be one of them. Instead I want to introduce a list of the most useful tricks I came across when dealing with financial time series in R. Some of the functions presented here are incredibly powerful but unfortunately buried in the documentation hence my desire to create a dedicated post. I only address daily or lower frequency times series. Dealing with higher frequency data requires specific tools: data.table or highfrequency packages are some of them.

I have to admit that I find the plotmath expressions in R a little fiddly to annotate plots with mathematical notation.

Apparently I am not the only one, but Stefano Meschiari did actually something about it. A few days ago his package latex2exp appeared on CRAN.

The package provides the wonderful function latex2exp that translates LaTeX code into plotmath expressions. Brillant! All I have to remember is to escape the "" character, that is write "\" instead of "".

Below is the first example from the plotmath help file and again using latex2exp. I think this is much easier to read and write.