Real estate prices, requests for teacher transfers or the professional attractiveness of large cities: there is no shortage of clues to say that Brittany is attractive, and the health crisis is far from having tarnished this characteristic. It is difficult, however, to measure these trends outside of the long periods of the censuses carried out by INSEE. Another indicator, however, offers a quick and detailed overview: telephones. The chips accompanying those who wear them “bound” on the relay antennas, making it possible to identify changes in place of life. Data from SFR Geostatistics analyzed by the “data + local” collective, bringing together journalists from the regional daily press including Le Télégramme, shed light on recent movements and new arrivals.
More arrivals than departures
First lesson: new Bretons are more numerous than those who leave, between November 2020 and October 2021, but not necessarily in increasing proportions. The adjusted data from SFR Geostatitics reflect a 0.5% increase in the number of inhabitants in the region. A rate consistent with the longer analyzes of INSEE: “Brittany has recorded an average annual growth of its population of 0.5% since 2011”, underlined INSEE in its last demographic report of the region.
Neighboring territories and Paris
Where do these neo-Bretons come from? Because these are indeed long-term arrivals: the data only takes into account trips more than 5 km away and presence in the same department for three weeks, each night, outside school holidays. Among the moves from a department outside administrative Brittany, Loire-Atlantique provides the most arrivals. Out of 100 moves, 5 to 10 come from the department of Nantes. Parisians and Normans from La Manche follow: these two departments each had 2% to 5% of the people newly present in October 2021.
Paris therefore does not represent the first “diaspora” between 2020 and 2021. Two reasons can explain this: first, the last few months have shown the attractiveness of cities further west for Nantes residents, as observed the notaries. Then, these movements take into account all types of mobility, contrary to certain assessments of the INSEE: a family which moves but also the installations or returns of students, for example, many to study in Nantes or Paris.
The more Parisian Finistère
And in detail between departments of the region? Unsurprisingly, Ille-et-Vilaine attracts the largest share: this area concentrates nearly one in four arrivals, with a strong representation from Normandy. The tip of Finistère and Morbihan share just under half of arrivals, from Loire-Atlantique and Île-de-France, against less than 15% of destinations to Côtes-d’Armor. With a specificity of Finistère: the department is the one that attracts the most inhabitants of inner Paris. More than one in ten new Finisterians lived there, almost as many as Loire-Atlantique.
Taking all travel into account also explains certain trends in the opposite direction: over one year, departures of Bretons are, first of all, to lands in the Ile-de-France region and Loire-Atlantique. Other zones appear, more numerous than for arrivals. The Rhône, the Var and the Bouches-du-Rhône have attracted as many Breton inhabitants as the Atlantic and Normandy coasts (between 2 and 5%). These departments are home to major urban and university centres.
These data provided by SFR Geostatistics to Le Parisien were analyzed by the “data+local” collective, bringing together journalists from the regional daily press. They are built from SIM card positions picked up by the antennas of the mobile network.
The values have been adjusted to be representative of the French population. They relate to people aged 11 to 79, having changed residence between November 2020 and October 2021, outside school holiday periods. SFR Business puts anonymized data from SFR Geostatistics at the service of the tourism, transport and local authorities sectors.
As with any statistical measurement, certain biases may exist (temporary trips, young children or people without a motive not taken into account). However, SFR Geostatistics applies an adjustment coefficient taking into account INSEE population data.
letelegramme Fr Trans