Magnus Ivar Aagaard Skeie

• Skeie, Magnus Ivar Aagaard; Kipperberg, Gorm & Navrud, Ståle (2026). Exploring the Effects of Attribute Translation on Scope Sensitivity in Contingent Valuation. The Case of Seabed Marine Debris Removal. Land Economics. ISSN 0023-7639. 102(3). doi: 10.3368/le.103.2.011926-0008r1. Fulltekst i vitenarkiv Vis sammendrag

  This paper tests whether presenting environmental program attributes in absolute versus relative numerical terms affects scope sensitivity, through a split-sample experiment in an original contingent valuation study for removing derelict fishing gear from Norwegian coastal waters. Results are mixed but indicate slightly lower scope sensitivity under relative raming. It also reports notable willingness to pay (WTP), as a one-time tax, for two partial and a full clean-up intervention of 100 km² of seabed. The paper highlights how subtle survey design choices can influence stated preferences and contributes to a scarce empirical base of welfare estimates for seabed marine debris removal.

• Skeie, Magnus Ivar Aagaard; Lindhjem, Henrik; Navrud, Ståle & Otterbring, Tobias (2025). How Sensitive are Environmental Values to Payment Card Design in Contingent Valuation? Land Economics. ISSN 0023-7639. 101(3), s. 398–422. doi: 10.3368/le.101.3.061924-0053R. Fulltekst i vitenarkiv Vis sammendrag

  Contingent valuation studies of people’s willingness-to-pay for ecosystem services are frequently used to inform the social benefit-cost analysis of environmental protection measures. While contingent valuation is generally accepted in this context, response anomalies exist. Drawing on the anchoring-and-adjustment heuristic in psychology and the context effects literature, we examine the impact of subtle design variation on people’s willingness-to-pay. In a split-sample national survey of willingness-to-pay to prevent coastal environmental damages from oil spills, different payment card elicitation formats significantly affect mean willingness-to-pay. This underscores the importance of a research agenda on the effects of subtle design variation on environmental value estimates.

• Skeie, Magnus Ivar Aagaard (2024). Decisions Affecting Choices: Current State and Future Directions for Applied Choice Architecture Research in Economics. Review of Behavioral Economics. ISSN 2326-6198. 11(3), s. 395–429. doi: 10.1561/105.00000194. Fulltekst i vitenarkiv Vis sammendrag

  Choice architecture (CA) is the design of decision-making environments. Experimental studies of CA interventions like nudges have been used to inform public policymaking. However, the generalizability of such experiments has been challenged frequently, and the welfare implications of paternalistic interventions like nudges are not self-evident. I conduct a systematic literature review of 52 publications from the Scopus and Web of Science databases to evaluate extant applied CA research in economics from an experimental design perspective and suggest future directions enabling more robust and welfare-enhancing policymaking. I reveal a notable absence of discussions pertaining to both internal and external validity and a predominant reliance on Western participants. Key recommendations include pivoting toward Pareto improving “signpost” interventions and increasing the focus on economic significance. I contribute to the literature by novelly adopting an experimental design viewpoint and broadening the review scope beyond nudges to provide deeper insights into the associated welfare implications.

• Skeie, Magnus Aa.; Lindhjem, Henrik; Skjeflo, Sofie Waage & Navrud, Ståle (2019). Smartphone and tablet effects in contingent valuation web surveys – No reason to worry? Ecological Economics. ISSN 0921-8009. 165. doi: 10.1016/j.ecolecon.2019.106390. Fulltekst i vitenarkiv Vis sammendrag

  Stated preference (SP) web surveys are increasingly completed on mobile devices such as smartphones and tablets instead of computers. Due to differences in technical attributes and response contexts of the devices, this trend may affect the quality of the survey data and elicited welfare measures. Little is known of such device effects in SP research. In the first such study of its kind, we compare willingness to pay (WTP) and response quality between devices in a large, national contingent valuation survey. Propensity score matching is used to distinguish device effects from observed sample composition effects due to self-selection. We find significantly higher WTP for smartphone respondents in the first out of four sequential WTP questions, and no differences for tablets. Concerning data (response) quality, results are mixed, but not consistently lower for smartphones and tablets compared to computers. Measured by indicators of response randomness, shares of don't know and protest zeros, smartphone responses even show signs of higher quality. Only in terms of the extent of internal scope sensitivity, do smartphones and tablets fare somewhat worse than computers. Overall, our results do not indicate substantial loss of response quality or differences in welfare measures for mobile devices. Contingent valuation Ecosystem services Mobile device Propensity score matching Survey quality

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• Wallevik, Kristin; Skeie, Magnus Ivar Aagaard; Vandvik, Vigdis; Poppe, Haagen Nilson; Nygård, Arild & Reinfjord, Espen Evensen (2025). Debatt. Naturkrise: Nyskapende arealplanlegging. doi: https:/www.arendalsuka.no/programsoek/details/31766. Fulltekst i vitenarkiv Vis sammendrag

  Planlagt utbygging og arealbruk i Norge står i konflikt med nasjonale miljø- og samfunnsmål, ifølge en fersk rapport fra Norkart. Flere viktige formål kjemper om gitte og begrensede arealer fremover, for eksempel fornybar energiproduksjon, datasentre, effektiv og sikker transport av gods og mennesker, og tiltak for å redusere klimaendringer, slik som vern av myrområder. Magnus Aagaard Skeie innleder om problematikken før det holdes en panelsamtale med representanter fra forskning, politikk, utbygging og rådgivning. Temaet for samtalen er hvordan vi bør tenke om og innrette politikk for arealbruk i norsk kontekst fremover, herunder aktuelle hindringer og muligheter.

• Skeie, Magnus Ivar Aagaard (2022). Effekten av å endre forhåndsdefinerte beløp på betalingsskala i to betinget verdsettingsstudier. Fulltekst i vitenarkiv
• Skeie, Magnus Ivar Aagaard (2022). Effects of a survey payment instrument on value formation for environmental goods: Experimental evidence from two contingent valuation studies. Fulltekst i vitenarkiv
• Skeie, Magnus Ivar Aagaard (2025). Understanding Choice Architecture Impacts on Stated Environmental Preferences from a Psychological Perspective: An Application to Coastal Zone Management. Universitetet i Agder. ISSN 9788284272856. Fulltekst i vitenarkiv Vis sammendrag

  This dissertation examines how changes in choice architecture in stated preference surveys influence individuals’ stated preferences for environmental goods. The work is motivated by the fact that cognitive limitations may cause real-world decisions to diverge from the predictions of standard neoclassical economic theory, which assumes fully informed and perfectly rational decision-makers. Even subtle changes to survey design—absent incentive effects—may act as cues for respondents and thereby influence their stated choices and willingness to pay. Two experimental studies investigate the impact of small changes in choice architecture on stated willingness to pay in separate stated preference contexts. A third study provides a systematic review of the experimental choice architecture literature in economics and discusses how future research can deliver more robust evidence for use in behaviorally informed economic policymaking. Overall, the dissertation advances stated preference research in environmental economics by demonstrating the effects of subtle choice architecture changes, estimating the welfare gains of removing marine litter from the seabed, and applying the choice architecture concept from psychology and behavioral economics to contextual changes in stated preference surveys without incentive implications.

Se alle arbeider i NVA