 So, ladies and gentlemen, here we are with the module 84, which is about the research on ex-efficiency in USA. This is an important case study, which I am going to discuss and this is the first time I have seen in USA, that this research or ex-efficiency, how it will come in your calculative numbers. Let us discuss that when the first empirical study took place, XC was done one year after Lebenstein's seminal article in 1966, then in 1967, they have been approximately 300 empirical data's eye, in which ex-efficiency was seen. Then almost all of them consist with the XC theory, then it became dependent on it and on the base of empirical data, understanding developed. Now, here today we try to understand that what would have happened if it had come on 0.022 and then when the ranking came on its 0.99, then what happened? So, this model was made, but the final stage was made, on which when the meaning of 0.8 came out, then the final meaning of ex-efficiency was 0.8. If you take it as an example, then I will recommend you Six Sigma, on which it came out on 9.99 or 3.33, then you get maximum results, i.e. for example, zero rating or zero error concept is not present in today's modern quality, but Six Sigma's error is in front of you, i.e. it comes with 0.3 space, so similarly when the ranking of XC was made, then 1.0 was made, then its firms on the frontier have XC ranking of 1.0, then all other firms have ranking from 0.99 to 0.00 and when its total mean came out or the mean came out, then 0.8 mean was finalized, in which you can understand the ex-efficiency, that whosoever the product or the service or the monopoly or the market comes on 0.8 gives you the ex-efficiency, where it comes from the ex-efficiency is 0.22, that implies two things, one is first for the same amount of input, the firm could have produced 20 percent more, i.e. if you get this much then you can make this much more, i.e. your efficiency will not be affected in the both end, either in the capital or in the individual level, i.e. you can take 20 percent more work from the employer and you can improve your capacity. Second, the same output the firm has been used 20 percent in pure inputs, this research has proved that we have to look at the potential, i.e. let me give you a layman example, how much power I have in my arms and how much strength I have in my punch, so even in modern fighting we can see that how much speed I have, for example I punch, so how much speed I have in my punch, and how much efficiency I have in my punch, to increase the capacity, so in the same way cars have also come, production has also come, so try to understand this, that when you bring it to x efficiency, then we will get to know from the percentage that how much percentage we have to increase it, that strength can be increased more and input can be taken, and how much more capacity development we have to increase, and space is left, this is how this research paper gives to the x efficiency, a thematic empirical data analysis, thank you very much.