一战战伤→急性失血→休克→死亡 二战:战伤→急性失血→输血→休克→死亡 E50s朝鲜战争战伤→急性失血→输血→休克复苏 后→少尿→急性肾衰→死亡

Why Use Instrumental Variables? e Instrumental Variables(IV)estimation is used when your model has endogenous xs That is, whenever Cov(x,l)≠0 Thus. i can be used to address the problem of omitted variable bias 2 Additionally iv can be used to solve the classic errors-in-variables problem Economics 20- Prof anderson

Integration.Smart/Optical Cards Matthew e. Baretich 117.2 Hospital Information Systems niversity of Colorado The Clinical Environment Healthcare Codes and Standards 117.1 Clinical Information Systems Luis Kun The main objective of this section is to provide the reader with a summary of areas that relate to clinical

Consistency e Under the Gauss-Markov assumptionS OLS IS BLUE, but in other cases it wont always be possible to find unbiased estimators o In those cases, we may settle for estimators that are consistent, meaning as n→>∞,the distribution of the estimator collapses to the parameter value Economics 20- Prof anderson

Parallels with Simple regression Bo is still the intercept B, to Bk all called slope parameters u is still the error term(or disturbance) Still need to make a zero conditional mean assumption, so now assume that E(lx,x2…,x)=0 Still minimizing the sum of squared residuals. so have k+l first order conditions Economics 20- Prof anderson

一、各种形式的交流电 交流电路:如果电源电动势e(t)随时间作周期性变化,则 各段电路中的电压u(t)和电流i(t)均随时间作周期性变 化,这种电路叫做交流电路

1.气泡问题 平行板电容器,原来充满均匀介质,A、B、等处的场强是均匀场Eo,现在A处挖一个球形 小空腔,问A、B两点场强比E增大还是减小?

1. Producer Theory 1. Technology yi =input of good i, y =output of good i, i= yi-yi=net output, y yn) is a production plan Production possibility set Y=technologically feasible production plans yE Rn) y E Y is technologically efficient if there is no yE Y s.t. y>y

.下列函数的极大值点和极小值点: (1)f(x,y) (2)f(x,y)=3axy-x3-y2(a>0) (3)f(x,y) (a,b>0) (4)f(x,y)=e2(x+y2+2y)

一、基数效用论——边际效用分析法 二、序数效用论——无差异曲线分析法 第五章 生产理论 一、生产要素L、K、N、E的投入与产量Q的关系 二、一种生产要素L的连续合理投入 三、两种生产要素L、K的连续同比例增加投入 四、两种生产要素L、K的最适组合 第六章 成本与收益 一、短期成本分析 二、长期成本分析 三、利润最大化原则