Internship report: Arthur Biamouret, RATP

Internship report Arthur BWhere did you do your internship and what was your role?

I did a six months internship at the Réseau Autonome des Transports Parisiens – RATP – headquarter in Paris to validate my M1. My mission was to try to design an econometric model to estimate the buses demand in Ile-de-France. I did everything, from cleaning the database to building the econometric model, testing hypothesis, and write a report about my findings. I was part of a team of engineers, and was thus the only person with an economic background. Hence, I was quite autonomous.

How did your studies/courses help you during your internship?

R courses helped me a lot, as it was the software I was working on during my internship, along with Excel and QGIS, a cartography software. Courses in econometrics were of course also very useful. However, I hardly knew how to clean databases, and this is something I regret not having learnt more deeply at TSE. School projects like the Applied Econometrics project taught me how to efficiently communicate and attribute tasks in a group, and it helped me a lot during my internship. My team gave me responsibilities, trusted me, and was always here to help me if needed; this is something I really appreciated. On the other hand, my internship changed my way of reading and learning my lessons. I try now to distinguish between theoretical parts – like mathematical proofs – and practical parts, and focus more on the latter, as they are the most important parts to remember at the end of the day.

How did you find your internship ? What advice would you give to students who would like to find a similar internship ?

I found this internship through the Alumni website. I was then contacted by the team I ended up working with for a call interview. I have to say I found my internship pretty late, and would like to give some advice to students – especially to M1 students – who are searching for an internship. I sent a lot of applications from October, but realised later that I did not adopt the most optimal strategy. I appreciated the Professional Development course, but I think it only gives you bases that you really have to develop to have an original and personal application. It was my first internship, and at first I did not focus enough on concrete skills I had, that are school projects, technical courses like the Empirical Industrial Organization course, software and personal projects. I started by applying for the positions I wanted the most, and I regret having done so. If it is your first internship, I advise you to apply first to positions that are not in your top list to get some practice. I admit I was disappointed by the Business Networking Day in the sense that I was pretty sure to get my internship there, but I later realised this is an event that is mostly useful to M2 students, or to students that already have some experience. However, I still recommend you to go and practise your elevator speech, as it will give you some training for real interviews. Finally, I would recommend sending quite a lot of applications, as the response rate might not be high for your first internship. However, sending them in January instead of October – while still keeping an eye open for potential offers during the autumn period – might be better. Finding your first internship might be hard, but once you get it, it becomes way easier to find other internships. I then worked at Veltys consulting in Paris during my gap year, and found this position quite easily.

Internship report: Kilian Heutte, European Commission

Internship report - Killian Heutte

Where did you do your internship and what was your role?

Last summer I did my internship in Brussels at the European Commission in the Directorate General for Competition, F4 Merger Unit, which is specialised in Post and Transport Services.

The European Commission is an EU institution with a power of investigation and intervention. The working languages are English, French and German. It is a big institution, counting more than 32,000 European civil servants. They are divided into departments called “Directorates-General” – DG – which are sub-divided into services – specialised in particular market sectors – which are also sub-divided into units – policy areas.

My work consisted in the treatment of companies’ merger cases. I had to draft legal documents, all following strict templates; some were internal to the European Commission, and some others were to be published to inform EU citizens and companies. I also helped to interpret outputs of market investigations that were specifically made for the cases I was working on.


How did your studies / courses at TSE help you during the internship?

The mathematical skills I gained at TSE enabled me to create a methodology to compute different market shares for many sub-segmentations of given markets.


How did you find your internship? What advice would you give to students to find a similar internship?

I heard from other TSE students that the European Commission was helping students by offering them the possibility to get an understanding of its work through some special programs. I was looking for hands-on experience in the competition sector to complement my theoretical knowledge. It was clear to me that I wanted to work for such an institution, so I applied. To students who would like to find a similar internship, I would suggest to send an e-mail as soon as possible to “”. You should provide some details concerning your availability, your motivation, the service/unit you would be interested in working in, etc,  with a CV and a cover letter.



Gap year report, Gaudéric Thiétart



What did you do during your gap year?

I decided to have both an international and a professional experience during my gap year. First, between September and January, I studied as an exchange student at the Carlos III University in Madrid. Then, I started a six months internship in a public policy consulting company in Montpellier.

What have you learnt from those experiences?

The main challenge for me was to live in a foreign country, and I realised I was able to do so: finding an accommodation, understanding and being understood by people, adapting myself to a new scholar system, etc. By improving my levels in both English and Spanish, I also realised I was now able to communicate with people from all around the world!

I also acquired more professional skills – technical and relational ones – during my internship, which will be very helpful for my future experiences.

Did you do your gap year after your bachelor or between your M1 and M2? Why so?

I did my gap year between my M1 and my M2. I made this choice because a lot of people at TSE told me that the M1 was the most difficult year. I preferred to pass all my M1 exams before leaving TSE for a year. I thought that the transition between the gap year and the M1 would have been harder than the one between the gap year and the M2.

Do you have recommendations / advice for TSE students about the “gap year experience”?

If you want to, just do it! Whether you decide to study in another university, to travel the world or to work as an intern, you will grow from this experience. You will know more about yourself and it will help you to make personal and professional choices in the future. We have the chance that TSE is encouraging to do a gap year; don’t miss this opportunity!

If I had just one more thing to say about my personal experience, it would be to give yourself some time if you want to have two distinct experiences as I did. I only had five days off between the end of my Erasmus exchange and the beginning of my internship. The transition was hard at first, so I would advise you to have a break in between.

Gap year report, Margaux Sinceux

GapYearReport - SINCEUX Margaux

What did you do during your gap year?

First, in order to pass my M1, I did an internship from May to October in Toulouse at Orange. I chose to continue it during my gap year, for six months in total instead of the four months required for the M1, to have a real experience. Then, I went to Reading – United-Kingdom – as an Erasmus student during the second semester, from January to June.

What have you learnt from those experiences?

My internship at Orange helped me getting further professional experience. Indeed, before that, I only did short-term internships of two months. It also helped me to find which M2 I wanted to apply for.

Concerning my semester in Reading, it was quite different from TSE because I had fewer modules – three modules, 30 ECTS – and therefore more free time to enjoy my experience there (discovering England and Scotland, being more familiar with the city and the campus, etc.). I did an Erasmus to improve my English to apply for the M2, but also to travel alone in a foreign country, to meet other foreign students and to discover how life is elsewhere.

Did you do your gap year after your bachelor or between your M1 and M2? Why so?

I did my gap year after my M1 because after being accepted in TSE, I wanted to see how it was to be in that school and how it was working. Moreover, the M1 was supposed to be the hardest year at TSE; therefore, I preferred to have a break after this year. I did not regret my choice because, thanks to my M1, I was already familiar with courses taught in English: it was helpful for my time in Reading. Furthermore, as I said, I wanted to do a longer internship.

Do you have recommendations / advice for TSE students about the “gap year experience”?

I recommend every student to do a gap year because it is a great opportunity, and TSE let us organise it as we want. For those who want to do an internship and an exchange in a university, I think the best way is to do first the internship and then the Erasmus, because usually the end of the second semester abroad is at most at the end of June: it gives you some time to have summer holidays and to travel from your host country to neighbouring countries if you wish to.