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This study aims to combine information about sea level rise (SLR), the probability distribution of storm surge, a flood damage function and the value of property by elevation along the coast of selected cities to measure expected flood damage. The selected six cities all have nearby long-term tidal stations that can be used to estimate the probability distribution of floods. The model is calibrated to each city. The study then compares the cost of building higher seawalls today along the coast versus the benefit of each wall (the reduction in expected flood damage).

The combination of coastal storms and SLR has led to extensive flood damage across American cities. This study creates a simple generic model that evaluates whether seawalls would be effective at addressing this flooding problem. The paper develops an approach that readily measures the expected flood benefits and costs of alternative coastal seawalls. The approach takes account of near term SLR and the probability distribution of storm surge. The model finds seawalls are effective only in cities where many buildings are in the 25-year flood plain.

Cities with many buildings built on land below 2 m in elevation (the 25-year flood plain) have high expected flood damage from storms and SLR. Cities which already have many buildings in this flood plain would benefit from seawalls. Assuming seawalls are built above the high tide line, the optimal wall height that maximizes net benefits is between 0.9 to 1.2 m. These relatively low seawalls block 70%–83% of expected flood damage in these cities. Fair flood insurance is the least cost strategy for handling the remaining damages that overtop the optimal seawalls.

The analysis evaluates whether or not to build a seawall the length of each city at high tide lines. However, the analysis also finds several long stretches of coast in two cities where a wall is not warranted because there are few vulnerable buildings. Future analyses should consider seawalls in more spatially detailed sections of each city. Each section could then be analyzed independently. Whether or not more complex hydrodynamic models are needed to evaluate coastal resilience planning should also be explored. Alternative solutions such as planned retreat and nature-based solutions should be compared with seawalls in future studies as well.

Cities should be careful to avoid development in the 25-year flood plain because of high expected flood damage. Cities that have low elevation areas subject to frequent flooding should consider seawalls to reduce frequent flooding. Because they are very costly and have low expected benefits, high walls that can stop a one-hundred-year storm are generally not worth building.

The analysis reveals that the most important factor determining the vulnerability of cities along the eastern coastline of the USA is the number of buildings built below 2 m in elevation (the 25-year flood plain). Cities should use zoning to discourage further development in the 25-year flood plain. Cities which already have many buildings in this flood plain would benefit from city-wide seawalls. Assuming these walls are built at mean high-high tide, the optimal height of current seawalls should be relatively modest – averaging about 0.9–1.2 m above ground. Using fair insurance for the remaining risk is less expensive than building taller walls. In particular, the cost of seawalls that protect against a major hurricane surge are over three times the expected benefit and should not be built. As decades pass and observed sea level progresses, seawalls and the boundary of the 25-year flood plain should be reevaluated.

This paper develops a coastal flood model that combines SLR and the probability distribution of storm surges with the value of property by elevation to estimate the expected damage from storm surge. The model is relatively easy to calibrate making it a practical tool to guide city flood planning. The authors illustrate what insights such a model gives about coastal resilience to flooding across six cities along the Eastern US coastline.

The simulated scenarios can be used to compute risk premiums per risk class in the portfolio. These can then be used to adjust the policy premiums by accounting for storm risk.

A complete model to analyse and characterise future losses of the property portfolio of an insurance company due to hurricanes is proposed. The model is calibrated by using the loss data of the Fidelidade insurance company property portfolio resulting from Hurricane Leslie, which hit the centre of continental Portugal in October, 2018.

Several scenarios are simulated and risk maps are constructed. The risk map of the company depends on its portfolio, especially its exposure, and provides a Hurricane risk management tool for the insurance company.

A statistical model is considered, in which weather data is not required. The authors reconstruct the behaviour of storms through the registered claims and respective losses.

Agricultural production in Honduras was devastated by the impact of hurricanes Eta and Iota in November 2020, placing people depending on agriculture in a vulnerable and food insecure situation. In addition to the COVID-19 pandemic and the economic downturn in the country, these extreme events are forcing more people to leave and head to North America in migrant caravans. Over the last decades, Honduras has been impacted by severe climate change events, including droughts and extreme tropical storms. According to the Global Climate Risk Index (CRI), developed by Germanwatch (Eckstein et al., 2019), Honduras was the second most affected country by climate change over a period of 20 years, from 1998 to 2017. Extreme rainfall and tropical storms, droughts, variation in rainfall patterns, and soil loss make agriculture more difficult, thus placing low-income rural families at the edge of hunger and food insecurity. In terms of migration policy, much focus has been given to economic instability, weak governance, violence and crime as push factors for migration, but the effect of food insecurity and climate change impact is often overlooked in this narrative. Agricultural areas in Honduras, traditionally the backbone of food production, have been identified as climate out-migration hotspots. The purpose of this chapter is to examine the most relevant data to understand the interactions between climate change, food insecurity and the current migration crisis in Honduras.

This case was developed using a mixture of publicly available documents created by the partner community, general information from public sources like the First Nations Finance Authority (FNFA) website and Government of Canada websites, and personal and first-hand experience of the indigenous coauthor, Storm Gould.

Wisikk is a Mi’kmaq sovereign reserve territory located in Mi’kmaq’ki in the place that settler governments call Nova Scotia. The community has existed in its location since time immemorial and has been recognized by the settler government since the early 19th century. An opportunity for community-run business has arisen for Wisikk based on the legalization of cannabis throughout Canada in 2018. This case’s protagonist is the community’s Vice-President for Business Development, Andrew Googoo, as he considers bringing a proposal for a cannabis retailing venture to the Chief and Council. Cannabis legalization in Canada left sales policies to the provinces and was silent as to the rules governing cannabis sales by indigenous communities on their sovereign territory. Considering both potential negative impacts to the community, as well as the potential financial benefits from a successful reserve-based cannabis dispensary, Andrew must soon present his initial findings to the Chief and Council for their deliberation and decision. Any venture undertaken by the reserve would require a loan from the FNFA, so Andrew must also consider the projections and reports that the FNFA would require to support their lending decision.

The case is appropriate for mid-level or capstone undergraduate and graduate business courses, especially those focused on entrepreneurship, business ownership or indigenous ownership. The case was originally developed for the accounting division of an international undergraduate case competition. In addition to accounting concepts like pro forma/budgeted income statements and decision analysis, it is intended to showcase some legal and cultural features of community-led indigenous business ventures. The idea is for students to explore concepts of sovereignty, community involvement and broader stakeholder impact, as well as more technical accounting and financial concepts.

This paper's purpose was to examine the impact of geomagnetic activity (GMA) on the timing and valuation of earnings information disclosed by firms every quarter.

The authors start the analyses with a sample of 112,669 client firms from 1989 to 2018. To analyze the impact of GMA on the earnings response coefficient (ERC), the authors use the three-day cumulative abnormal returns and cumulative abnormal returns for the extended post-earnings announcement window [2, 75] as the dependent variables. The authors interact unexpected earnings (UE) with the C9 Index, an index commonly used to measure GMA and study how GMA affects the pricing of new public information. To examine the effect of GMA on the timing of disclosure of earnings news, the authors regress a variant of the GMA index on the propensity to disclose bad earnings news.

The authors find significantly lower earnings response coefficients during periods of high GMA. This effect is permanent and stock prices do not correctly incorporate the implications of earnings information over time. The authors also show that managerial behavior is affected by GMA as well and the managers are more (less) likely to release bad (good) news during periods of higher activity. Finally, the authors also find that in situations where stakeholders are likely to rely on modern technology that depends minimally on humans, the adverse impact of GMA on the pricing of earnings information is mitigated.

The literature on the effect of GMA on the capital market is very limited and focuses primarily on stock returns, while the behavioral finance literature focuses on circumstances like weather, temperature and sporting outcome to study how the investors' mood affects their capital market behavior. The authors add to both the literature by investigating how GMA influences investors' and managers' behaviors in the capital market.