Introduction a lutilisation du logiciel stata description. Stata module to derive generalised lorenz curve ordinates with unit record data version 7, statistical software components s417401, boston college department of economics, revised 27 oct 2004. The stata software has become a very popular tool to transform and process data. Fx, glcurve either draws its generalised lorenz curve or generates two new variables containing the generalised lorenz ordinates for x, i. It comes with a large number of basic data management modules that are highly efficient for transformation of large datasets. Stata module to produce pens parade, lorenz and generalised lorenz curve, statistical software components s456749. Stata is not sold in modules, which means you get everything you need in one package. Stata module to estimate and display lorenz curves and concentration curves.
Pdf estimating lorenz and concentration curves in stata. Stata users, however, have developed an excellent suite of. For example, it reveals that in my example 60 percent of the population receive only 40 percent of the overall income in the country. Statistical software components from boston college department of economics. The stata code run but my problem is that the graph is wrong, because all incomes appear as straight lines i mean over y axis and those dont look as curves under line 45 that i was created. The environmental kuznets curve suggests that economic development initially leads to a deterioration in the environment, but after a certain level of economic growth, a society begins to improve its relationship with the environment and levels of environmental degradation reduces. Coordinates of curves can be listed or saved in a new stata file. Stata module to estimate and display lorenz curves and. The lorenz command supports relative, generalized, absolute, unnormalized, customnormalized lorenz, and concentration curves.
I have to construct a single graph whit lorenz curve of varname, lorenz curve of varname where population are ordered in descending order of varname and a 45 line. Stata module to fit a sequential logit model author. Decomposing inequality and obtaining marginal effects. The lorenz command supports relative as well as generalized, absolute, unnor. But for any stata 8, those commands are no longer state of the art, about a decade behind the stata times. Sep 23, 2014 there is an earlier video titled lorenz curve in excel. Stata provides ado files that will calculate the gini coefficient as well as several other inequality indices.
Using trapezoidal rule for the area under a curve calculation shitao yeh, glaxosmithkline, collegeville, pa. We have found that students who work though the exercises in this appendix acquire the necessary mastery, and are ready to tackle almost any chal. Calculating gini coefficient of world income inequality. Since the op used linear regression she could better use the ftest rather than the likelihood ratio test.
There is an earlier video titled lorenz curve in excel. Estimating lorenz and concentration curves in stata ben jann institute of sociology university of bern ben. What happens to the gini coefficient as i add many higherincome people. Distributions can be compared within subgroups defined by a second variable. Adrian mander statistical software components from boston college department of economics. Calculating gini coefficient of worldincome inequality with stata replicating and extending arrighidrangel findings with stata software related issues. Abstract the trapezoidal rule is a numerical integration method to be used to approximate the integral or the area under a curve. In this paper i present a new stata command called lorenz that estimates lorenz and. Lorenz curves lp, generalised lorenz curves glp, concentration curves cp. In general, it shows what percent of the population earn how much of the total income. Stata module to estimate and display lorenz curves and concentration curves, statistical software components s4583, boston college department of economics, revised 15 jun 2018. We use cookies to offer you a better experience, personalize content, tailor advertising, provide social media features, and better understand the use of our services. The program works very much like the official programs cumul or kdensity.
The glcurve command is updated to a stata 7 version, glcurve7, which is described and illustrated. Generalized lorenz curves and related graphs the stata journal. Stata module to estimate and display lorenz curves. Fx, glcurve either draws its generalised lorenz curve or generates two new variables containing the generalised lorenz. Abdelkrim araar statistical software components from boston college department of economics. An ebook reader can be a software application for use on a computer. You are presumably using stata if not, you should be telling us. I am attempting to produce an overlayed xtline plot that distinguishes between males and females or any number of multiple groups by displaying different plot. Stata module to derive generalised lorenz curve ordinates. Suppose i start out with a very equal population, with an income of 2 each. Quantile group shares, cumulative shares lorenz ordinates, generalized lorenz ordinates, and gini number of strata 1 number of obs 9772 number of psus 9772 population size 54872650. According to a lis training document, the stata code to do this is. It comes with a large number of basic data management modules that are. I have to construct a single graph whit lorenz curve of varname, lorenz curve of varname where population are ordered in descending order of.
Hello there, actually i am trying to compare lorenz curves 3 different incomes and i want to construct the line of 45 grades. Roc curve analysis with medcalc medcalc statistical software. You can do anything pretty easily with r, for instance, calculate concentration indexes such as the gini index or display the lorenz curve dedicated to my students. Relative as well as generalized, absolute, unnormalized, or customnormalized lorenz or concentration curves are supported, and tools for computing contrasts between different subpopulations or outcome variables are provided. In this paper i present a new stata command called lorenz that estimates lorenz and concentration curves from individuallevel data and, optionally, displays the results in a graph. The flexibility of stata also enables programmers to provide specialized. Although i did not explain it during my lectures, calculating a gini index or displaying the lorenz. In fact, if you only add 1 interaction variable, you can just look at the test statistic next to that added variable.
Stata module to plot lorenz curve type findit glcurve or ssc install glcurve in stata prompt to install free addon to stata to compute inequality and poverty measures. Suppose that n observations patient visits are dispersed among n experimental units physicians. Version control ensures statistical programs will continue to produce the same results no matter when you wrote them. Roc curve analysis in medcalc includes calculation of area under the curve auc, youden index, optimal criterion and predictive values. Last fresh install of the desktop version of xubuntu 18. In this paper i present a new stata command called lorenz that estimates lorenz and concentration curves. For all who do not know the lorenz curve, here is an illustration. Stata xtline overlayed plot for multiple groups stack. For future reference, you might want to use scsomersd rather than somersd to calculate the gini coefficient with confidence limits. I have a hard time showing the lorenz curve in tableau. Stata is a suite of applications used for data analysis, data management, and graphics. No 15, university of bern social sciences working papers from university of bern, department of social sciences abstract.
Stata module to estimate lorenz and concentration curves, statistical software components s456515, boston college department of economics. The lorenz command supports relative as well as generalized, absolute, unnormalized, or customnormalized lorenz. I have data on some variables, say x y and z 3 assets. Have you ever seen the difference in the quality of the helpfiles. What about the fact you cant call mata within a stata loop and vice versa, such that any code you want to run many times has to be written entirely in mata or in stata. Using a trapezoidal rule for the area under a curve. For a population ordered in ascending order of x, a graph of glp against p plots the cumulative total of x divided by population size, against.
Stata module to produce pens parade, lorenz and generalised lorenz curve jpazvdalorenz. Hello, is it possible to construct a lorenz curve of a varname computed whit a population ordered in descending order of varname. Quantile group shares, cumulative shares lorenz ordinates. Estimating the empirical lorenz curve and gini coefficient. Query on plotting lorenz curves on stata stack overflow. Nov 18, 2010 i presume that you want to produce a lorenz curve. Calculating the gini coefficient from lis data in stata. If you type, in stata, findit lorenz then you will find a choice of programs to plot a lorenz curve. Stata data analysis, comprehensive statistical software. Lorenz curve tableau community forums tableau software. Stata module to estimate and display lorenz curves and concentration curves, statistical software components s4583, boston. Free online software calculator computes the gini coefficient, plots the lorenz curve, and computes many other measures of concentration for any dataset. To construct the loren curve where population are ordered in descending order of varname i typed.
Ipea statistical software components from boston college department of economics. The graphics commands you are using are for stata 7. Stata statistical software is a complete, integrated statistical software package that provides everything you need for data analysis, data management, and graphics. Although i did not explain it during my lectures, calculating a gini index or displaying the lorenz curve can be done very easily with r. In stata that means using the test command instead of the lrtest command. The integration of a, b from a functional form is divided into n equal pieces, called a trapezoid. Estimating lorenz and concentration curves ben jann, 2016. Stata commands command centile incomevar if yearx centile. Stata module to estimate lorenz and concentration curves. Estimating lorenz and concentration curves in stata.
Try the search command used by the stata software to search statas keyword. Stata module to produce pens parade, lorenz and generalised lorenz curve. Reza, what you see are the generalized lorenz curves. I need to calculate the gini coefficient from disposable personal income data at lis. Lorenz and concentration curves are widely used tools in inequality research. Working with household data sets requires a solid mastery of appropriate statistical and data management software, such as stata or spss. The reason your line of perfect equality does not pass through 0,0 is because the values for your variable do not contain 0. Our interest lies in studying the concentration or distribution of a feature of each of the n observations across the n members. In this paper i present a new stata command called lorenz that estimates lorenz and concentration.
It also provides tools for computing contrasts between different subpopulations or outcome variables. The program generates a full listing of criterion values and coordinates of the roc curve. Relative as well as generalized, absolute, unnormalized, or customnormalized lorenz. We represent the number of observations for each experimental unit as m k, k 1, n. Compare the lorenz curves for the populations 10, 20, 35, 35 and 15, 15, 30, 40. Stata module to produce pens parade, lorenz and generalised lorenz curve, statistical software components s456749, boston college department of economics, revised apr 2020. What about the archaic way you pass variables between mata and stata. Creating a lorenz curve from excel university of washington. It focuses on how to construct a lorenz curve from raw da.
Stata module to plot a cumulative distribution function. Hi everyone im currently trying to calculate the following. Advertisement autoplay when autoplay is enabled, a suggested video will automatically play next. Although this value will asymptotically approach 0, it will never actually reach 0. Principaux elements et commandes dinitiation au logiciel stata.
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