Polytechnic Institute of Porto

Event-related potentials reveal enhanced processing of social media over monetary rewards

Since the first online social media platform, using social media has emerged as one of the defining behaviors of the new millennium. For most users such behavior is recreational. However, for some individuals, the use of social media may develop to problematic, compromising their...

Influencers' characteristics and communication strategies in purchase intention at festivals

Purpose Brands use influencer marketing as a key method to connect with event attendees during festivals. The ability of influencers to form stronger bonds with their audience can increase consumers' purchase intention. This study investigates how influencer characteristics and c...

A lean-based method for patient journey improvement: enhancing value and performance in healthcare delivery

Purpose This research introduces a lean-based method, from the customer’s perspective, aimed at continuously improving the sequence of value and non-value stages throughout the purchase journey, named the ideal customer journey method (ICJM). Design/methodology/approach The ICJM...

Dimensional Asymptotics of Euler-Based Simulated Likelihood for Multidimensional Diffusions

A widely used simulation method for likelihood inference in discretely observed diffusions approximates each transition density by simulating an Euler scheme to one step before the observed endpoint and averaging the final Gaussian density. We show that this endpoint estimator is...

Dimensional Asymptotics of Euler-Based Simulated Likelihood for Multidimensional Diffusions

A widely used simulation method for likelihood inference in discretely observed diffusions approximates each transition density by simulating an Euler scheme to one step before the observed endpoint and averaging the final Gaussian density. We show that this endpoint estimator is...

Dimensional Asymptotics of Euler-Based Simulated Likelihood for Multidimensional Diffusions

A widely used simulation method for likelihood inference in discretely observed diffusions approximates each transition density by simulating an Euler scheme to one step before the observed endpoint and averaging the final Gaussian density. We show that this endpoint estimator is...

Dimensional Asymptotics of Euler-Based Simulated Likelihood for Multidimensional Diffusions

A widely used simulation method for likelihood inference in discretely observed diffusions approximates each transition density by simulating an Euler scheme to one step before the observed endpoint and averaging the final Gaussian density. We show that this endpoint estimator is...

Dimensional Asymptotics of Euler-Based Simulated Likelihood for Multidimensional Diffusions

A widely used simulation method for likelihood inference in discretely observed diffusions approximates each transition density by simulating an Euler scheme to one step before the observed endpoint and averaging the final Gaussian density. We show that this endpoint estimator is...

The Role of Authenticity and Creativity in Street Art Advertising

This paper discusses the motivations of brands that use street art in their communication strategies and the consequences of this artistic approach on consumer attitudes. A conceptual model suggests three key antecedents of the street art advertising message: authenticity, percei...

Lightweight Llama Models with Experts’ Curated RAG for Electrical Engineering Education: An Exploratory Comparison

This study investigates the benefits of expanding small and open Large Language Models (Llama 3.x family) with retrieval and explicit referencing (retrieval-augmented generation), configured to refuse to respond when unsure about the answer. Additionally, we compare this augmente...

Dimensional Asymptotics of Euler-Based Simulated Likelihood for Multidimensional Diffusions

A widely used simulation method for likelihood inference in discretely observed diffusions approximates each transition density by simulating an Euler scheme to one step before the observed endpoint and averaging the final Gaussian density. We show that this endpoint estimator is...

Dimensional Asymptotics of Euler-Based Simulated Likelihood for Multidimensional Diffusions

A widely used simulation method for likelihood inference in discretely observed diffusions approximates each transition density by simulating an Euler scheme to one step before the observed endpoint and averaging the final Gaussian density. We show that this endpoint estimator is...

Dimensional Asymptotics of Euler-Based Simulated Likelihood for Multidimensional Diffusions

A widely used simulation method for likelihood inference in discretely observed diffusions approximates each transition density by simulating an Euler scheme to one step before the observed endpoint and averaging the final Gaussian density. We show that this endpoint estimator is...