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Between the Pattern and the Type: A short parallel story

Historically speaking, the notion of the type was reintroduced to the larger architectural discourse as a direct consequence of the crisis of the Modern. The task of revisiting the forms of the past also dictated the return of architectural methods that ha ...

2023

Timing and spatial selection bias in rapid extreme event attribution

Anthony Christopher Davison, Ophélia Mireille Anna Miralles

Selection bias may arise when data have been chosen in a way that subsequent analysis does not account for. Such bias can arise in climate event attribution studies that are performed rapidly after a devastating "trigger event'', whose occurrence correspon ...

ELSEVIER2023

Technology Strategy in Dynamic Environments: A Computational Analysis of the Automation of Routines, the Organization of AI, and the Evaluation of Technology Risk

Maximilian Wieland Hofer

In this dissertation, I develop theory and evidence to argue that new technologies are central to how firms organize to create and capture value. I use computational methods such as reinforcement learning and probabilistic topic modeling to investigate thr ...

EPFL2022

Getting more from many - A framework of community resourcefulness in new venture creation

Emmanuelle Fauchart Foray, Julia Katharina Binder, Christina Julia Hertel

In this study, we move beyond the predominant focus entrepreneurship researchers have put on the acquisition of financial capital from professional investors by exploring how, and with what effects, entrepreneurs can mobilize all required resources?financi ...

2021

An unethical optimization principle

Anthony Christopher Davison

If an artificial intelligence aims to maximize risk-adjusted return, then under mild conditions it is disproportionately likely to pick an unethical strategy unless the objective function allows sufficiently for this risk. Even if the proportion eta of ava ...

ROYAL SOC2020

Why Does Fast Loan Growth Predict Poor Performance for Banks?

Rüdiger Fahlenbrach

From 1973 to 2014, the common stock of U.S. banks with loan growth in the top quartile of banks over a three-year period significantly underperformed the common stock of banks with loan growth in the bottom quartile over the next three years. After the per ...

2018

Non-myopic betas

Semyon Malamud

An overlapping generations model with investors having heterogeneous investment horizons leads to a two-factor asset pricing model. The risk premiums are determined by the exposure to the market (myopic betas) and the future return on the efficient portfol ...

2018

Hedge or Rebalance: Optimal Risk Management with Transaction Costs

Semyon Malamud

We solve the problem of optimal risk management for an investor holding an illiquid, alpha-generating fund and hedging his/her position with a liquid futures contract. When the investor is subject to a lower bound on net return, he/she is forced to reduce ...

2018

Potential contributions of wind power to a stable and highly renewable Swiss power supply

Michael Lehning, Annelen Kahl, Albertus Christiaan Kruyt

Using data from two measurement networks, we analyse the following aspects of wind speeds over Switzerland to assess the possibility of high wind power penetration: spatial correlation, persistent low wind power conditions and the diurnal and seasonal wind ...

Elsevier Sci Ltd2017

Multi-Period Portfolio Optimization: Translation of Autocorrelation Risk to Excess Variance

Napat Rujeerapaiboon, Byung-Geun Choi

Growth-optimal portfolios are guaranteed to accumulate higher wealth than any other investment strategy in the long run. However, they tend to be risky in the short term. For serially uncorrelated markets, similar portfolios with more robust guarantees hav ...

2016

Yes, no, maybe: the ambiguous relationship between State-owned Enterprise and the State

Matthias Finger, Carole Juliane Isabelle Rentsch

Liberalization and the introduction of sector-specific regulators has caused the position of State-owned enterprises (SOEs) of network industries to change not only within national economies, but also vis-a-vis their respective States. In response, many SO ...

Wiley_Blackwell2015

Geometric Mixing, Peristalsis, and the Geometric Phase of the Stomach

Nicolas Piro Mastracchio

Mixing fluid in a container at low Reynolds number-in an inertialess environment-is not a trivial task. Reciprocating motions merely lead to cycles of mixing and unmixing, so continuous rotation, as used in many technological applications, would appear to ...

Public Library Science2015

On the (Non-)Equivalence of IRR and NPV

Thomas Alois Weber

The internal rate of return (IRR) is generally considered inferior to the net present value (NPV) as a tool for evaluating and ranking projects, despite its inherently useful comparability to the cost of capital and the return of other investment opportuni ...

2014

Colour simplex coding for brillouin distributed sensors

Luc Thévenaz, Marcelo Alfonso Soto Hernandez

The possibility to customize Simplex coding for long range Brillouin Optical Time Domain Analysis is demonstrated by “colouring” the sequences in the frequency domain. The coding gain is identical to the traditional intensity-modulated Simplex code, though ...

2013

Gyroscopic assistance for human balance

Falls are an urgent challenge in aging societies, and balance dysfunction is a major risk factor. Current robotic technology that assists human locomotion, however, aims at versatile functionality, particularly in the assistance of weak muscles. Such versa ...

2012

Time/frequency coding for Brillouin distributed sensors

Luc Thévenaz, Marcelo Alfonso Soto Hernandez

In this paper, we propose a novel coding for long range Brillouin Optical Time Analysis (BOTDA) distributed sensors based on a combination of time and frequency pulses, resulting in an additional coding gain of √2 with respect to traditional intensit ...

2012

Return mobility and scientific productivity of researchers working abroad: The role of home country linkages

Stefano Horst Baruffaldi

Through an analysis of 497 foreign researchers in Italy and Portugal we verify the impact of home linkages on return mobility choices and scientific productivity. We consider the presence of several different types of linkages of the researchers working ab ...

Elsevier Science Bv2012

Essays in Financial Economics

Jan Peter Kulak

In the first chapter of this thesis, I empirically show that the time delay firms face in raising outside capital affects cash holdings. I exploit the 2005 US Securities Offering Reform (the Reform) as a quasi-natural experiment. For a subset of large publ ...

EPFL2012

Improved Methodology for Rock Fall Hazard Zoning at the Local Scale

Jacopo Maria Abbruzzese

Rock falls represent a serious threat to communities living in mountainous areas in several European countries, and their potential hazard must be taken into account for an appropriate land use planning and for establishing risk mitigation measures. Rock f ...

EPFL2011

Optimal Selection of Customers for a Last-Minute Offer

Thomas Rothvoss

We analyze a short-term revenue optimization problem involving the targeting of customers for a promotion in which a finite number of perishable items are sold on a last-minute offer. The goal is to select the subset of customers to whom the offer will be ...

2010