The Ghost Towns of the Future: Navigating the Geography of Ageing and Depopulation
In an era of global demographic shifts, the spectre of ghost towns looms large, particularly in regions grappling with ageing populations and shrinking youth numbers. As governments worldwide grapple with these challenges, the question arises: how can we revitalise these areas, and at what cost?
Japan, a nation at the forefront of this demographic crisis, has embarked on a regional revitalisation journey, recognising the intricate link between low fertility, population ageing, and the need for strategic intervention. This mirrors efforts in Spain, Italy, and the European Commission, where billions are being invested to address the 'demographic challenge'.
But the crux of the issue isn't just about throwing money at the problem. It's about understanding the complex interplay of geography, demographics, and economics. Who leaves these regions, who stays, and how do these decisions reshape the very fabric of local communities?
In my recent study, we delve into this enigma, using Japan as a case study. The country's demographic trajectory is a harbinger of what's to come for parts of Europe and East Asia. By 2050, nearly 37% of Japan's population is projected to be aged 65 or older, a stark contrast to the global average.
Here's the intriguing part: the ageing phenomenon isn't uniform across Japan. Some rural areas are already grappling with elderly populations nearing 50%, while metropolitan hubs like Tokyo remain relatively youthful. This spatial disparity is a critical lens through which we must view the problem.
The demographic divergence isn't solely about fertility rates; it's a migration saga. Young adults gravitate towards the allure of big cities, leaving behind their hometowns. This exodus has a ripple effect, as their children are born in these urban centres, further exacerbating the ageing of rural regions. It's a demographic domino effect, where today's outmigration shapes tomorrow's birth rates.
Personally, I find this dynamic fascinating. It's a testament to the power of individual choices and how they collectively shape the destiny of places. But it also underscores the challenges of maintaining local economies, which hinge on a critical mass of residents and taxpayers.
Our research reveals that areas losing their working-age population face a decline in local amenities, from retail to medical services. Simultaneously, the cost of public services per person skyrockets. This is the fiscal conundrum of ghost towns: fewer people, higher costs, and a dwindling economic base.
To predict the future, we crafted a dynamic spatial model, factoring in wages, housing costs, amenities, migration, pensions, and taxes. The results are eye-opening. Over the next two centuries, Tokyo's population share is projected to surge, while the oldest prefectures—Kochi, Shimane, Tokushima, Tottori, and Yamagata—face a stark decline.
This isn't just a demographic shift; it's a spatial inequality crisis. The allure of higher productivity and amenities in Tokyo outweighs the congestion, attracting more residents. Conversely, declining regions lose their appeal, creating a vicious cycle of regional divergence.
The policy implications are profound. While preventing migration or fixing birth rates might seem like solutions, they come with trade-offs. Such measures could keep people in less productive regions, increasing the cost of public services. It's an equity-efficiency dilemma, where place-based policies must tread carefully.
Recent studies on place-based policies highlight the complexities. Subsidies might have spillover effects, but their impact on regional inequality is modest. The mobility of retirees can bring economic benefits to rural areas, but it's the exodus of young workers that defines ageing Japan's trajectory.
Simulating a policy of transfers to the oldest prefectures, funded by Tokyo residents, offers insights. While it can slow the decline and reduce elderly shares, it comes at a cost. It reshapes where people live and work, impacting local economies and services over decades.
The key takeaway? Ageing and depopulation demand a spatial perspective. Policies must navigate the intricate balance between preserving essential services, supporting communities, encouraging mobility, and maintaining productivity. It's a delicate dance, and one that requires a nuanced understanding of the geography of ageing.
