MatchIt | MatchIt provides a simple and straightforward interface | Development Tools library

I have a dataset with a couple of missing values and would need to run a propensity score matching using the variable 'y' as Treatment variable and x1, x2 and x3 as variables for adjustment. By using the following code with Matchit

I have matched my two groups with 1:5 ratio and noticed that my two resulting groups do not have a 1:5 ratio, similar to this question posted here:

3:1 matching with MatchIt in R. The number of matched control is not equal to 3 times the number of cases

I have performed a match like this:

#1:1 nearest neighbour

I am trying to create a descriptive statistics table using the table1 with p-values and data from an SAV file. I read in the file using read_sav from the haven package.

I am trying to use MatchIt to perform Propensity Score Matching (PSM) for my panel data. The data is panel data that contains multi-year observations from the same group of companies.

The data is basically describing a list of bond data and the financial data of their issuers, also the bond terms such as issued date, coupon rate, maturity, and bond type of bonds issued by them. For instance:

......

I've already known how to match the observations by the criteria I want and I use exact = Year to make sure I match observations from the same year. The problem now I am facing is that the observations from the same companies will be matched together, this is not what I want. The code I used:

matchit(Bond_type ~ Year + Amount_Issued + Cpn + Total_Assets_bf + AssetsEquityRatio_bf + Asset_Turnover_bf, data = rdata, method = "nearest", distance = "glm", exact = "Year")

However, as you can see, in the second raw of my sample, there might be two observations in one year from the same companies due to the nature of my study (the company can issue bonds more than one time a year). The only difference between them is the Bond_type. Therefore, the MathcIt function will, of course, treat them as the best control and treatment group and match these two observations together since they have the same ROA and other matching factors in that year.

I have two ways to solve this in my opinion:

1. Remove the observations from the same year and company, however, removing the observations might lead to bias results and ruined the study.

2. Preventing MatchIt function match the observations from the same company (or with the same Frimnames)

The second approach will be better since it will not lead to bias, however, I don't know if I can do this in MatchIt function. Hope someone can give me some advice on this or maybe there's any better solution to this problem, please be so kind to share with me, thanks in advance!

Note: If there's any further information or requirement I should provide, please just inform me. This is my first time raising the question here!

I have used standard SystemVerilog syntax packages but not able to match(with % move the cursor between) these strings. This is in the context of matchit function in Vim(https://www.vim.org/scripts/script.php?script_id=39). The problem seems to be with backtick.

I tried:

I am a newbie in Scala and I want to build a small recursive pattern matching with objects. I keep getting a No match in the following code:

I am currently trying to build a web app with the new Flutter web beta. The thing is to be able to have a history, handle the forward and back buttons in the browser and be able to handle user inputs into the URL the new Navigator 2.0 API is required (at least from what I understood).

There are only a few resources available currently, based on which I am trying to build my Navigator. The resources I used:

• (My Main Source)'Learning Flutter’s new navigation and routing system' by John Ryan
• A similar project (by orestesgaolin) but with a page manager and more complex
• The publicly shared document by flutter about the new Navigator

I managed to get the Back and forward button, as well as the history working. However I am struggling to be able to handle the page switches (in the Navigator()). In the example from John he manages the different sites in the 'page: ' array of the Navigator Widget (in the routeDelegater). It seemed strange to me but I tried it like this and it did not really work (Code further down).

In the 'page: []' I first tried to have booleans that trigger (like the show404) but that wasn't very clean so my next try was to get the current page as follows (in the array):

I have a pandas dataframe with a column that is essentially an array but represented as a string. This dataframe can be recreated by