title: Modeling seasonality in new product diffusion

authors: Peers, Y.

subjects: diffusion models

abstract: We propose a method to include seasonality in any diffusion model that has a closed-form solution. The resulting diffusion model captures seasonality in a way that naturally matches the original diffusion model’s pattern. The method assumes that additional sales at seasonal peaks are drawn from previous or future periods. This implies that the seasonal pattern does not inﬂuence the underlying diffusion pattern. The model is compared with alternative approaches through simulations and empirical examples. As alternatives, we consider the standard Generalized Bass Model (GBM) and the basic Bass Model, which ignores seasonality. One of the main ﬁndings is that modeling seasonality in a GBM generates good predictions but gives biased estimates. In particular, the market potential parameter is underestimated. Ignoring seasonality in cases where data of the entire diffusion period are available gives unbiased parameter estimates in most relevant scenarios. However,ignoring seasonality leads to biased parameter estimates and predictions when only part of the diffusion period is available. We demonstrate that our model gives correct estimates and predictions even if the full diffusion process is not yet available.

text: Modeling seasonality in new product diffusion We propose a method to include seasonality in any diffusion model that has a closed-form solution. The resulting diffusion model captures seasonality in a way that naturally matches the original diffusion model’s pattern. The method assumes that additional sales at seasonal peaks are drawn from previous or future periods. This implies that the seasonal pattern does not inﬂuence the underlying diffusion pattern. The model is compared with alternative approaches through simulations and empirical examples. As alternatives, we consider the standard Generalized Bass Model (GBM) and the basic Bass Model, which ignores seasonality. One of the main ﬁndings is that modeling seasonality in a GBM generates good predictions but gives biased estimates. In particular, the market potential parameter is underestimated. Ignoring seasonality in cases where data of the entire diffusion period are available gives unbiased parameter estimates in most relevant scenarios. However,ignoring seasonality leads to biased parameter estimates and predictions when only part of the diffusion period is available. We demonstrate that our model gives correct estimates and predictions even if the full diffusion process is not yet available.

year: 2012

title: New Zealand therapist insights into the intersecting fields of sexualities and childhood

authors: Flanagan, Paul G.

subjects: Aotearoa New Zealand

abstract: Little research has been published about therapists’ insights into the intersecting fields of sexualities and childhood. In this paper, I focus on therapists’ responses from my recently completed doctoral research project in Aotearoa New Zealand. In this study, I analysed “talk” by adults (parents, teachers, and therapists), responding to the question: What language is used to describe childhood sexuality by adults in Aotearoa New Zealand? Through group and individual interviews, participants were invited to respond to a range of vignettes about children’s actions that some people regard as sexual. The analysis shows that therapists, like parents and teachers, drew on heteronormative ideas of child development to describe and shape children’s expressions of sexuality. Questions about gender and sexual pleasure in childhood are discussed and the article concludes with an invitation to counsellors to examine their own positioning in their talk about the child and sexuality.

text: New Zealand therapist insights into the intersecting fields of sexualities and childhood Little research has been published about therapists’ insights into the intersecting fields of sexualities and childhood. In this paper, I focus on therapists’ responses from my recently completed doctoral research project in Aotearoa New Zealand. In this study, I analysed “talk” by adults (parents, teachers, and therapists), responding to the question: What language is used to describe childhood sexuality by adults in Aotearoa New Zealand? Through group and individual interviews, participants were invited to respond to a range of vignettes about children’s actions that some people regard as sexual. The analysis shows that therapists, like parents and teachers, drew on heteronormative ideas of child development to describe and shape children’s expressions of sexuality. Questions about gender and sexual pleasure in childhood are discussed and the article concludes with an invitation to counsellors to examine their own positioning in their talk about the child and sexuality.

year: 2020

title: Decolonising professional learning: Weaving a whānau of interest

authors: Pennicott, Katie

subjects: educational leadership

abstract: Raranga (weaving) has been described as an act of decolonisation and resistance. In my experience, learning to weave was more than an act of learning the tikanga (rituals) and methods with which to weave flax and tukutuku (lattice work); it was learning about learning and learning about living, life and all the things that make us who we are. As I experienced and began to understand Māori metaphors such as whanaungatanga, kaupapa, ako and manaakitanga I found that learning the art of weaving shaped me as I shaped the weaving. This thesis ideates a metaphor of weaving to describe a model of cultural and structural school reform that emerged from a school’s teaching and learning collaborations over time. It calls for the weaving of a new, decolonised model of education.

text: Decolonising professional learning: Weaving a whānau of interest Raranga (weaving) has been described as an act of decolonisation and resistance. In my experience, learning to weave was more than an act of learning the tikanga (rituals) and methods with which to weave flax and tukutuku (lattice work); it was learning about learning and learning about living, life and all the things that make us who we are. As I experienced and began to understand Māori metaphors such as whanaungatanga, kaupapa, ako and manaakitanga I found that learning the art of weaving shaped me as I shaped the weaving. This thesis ideates a metaphor of weaving to describe a model of cultural and structural school reform that emerged from a school’s teaching and learning collaborations over time. It calls for the weaving of a new, decolonised model of education.

year: 2020