While Jomar and his brother, Franklin, are on their stoop waiting for Grandpa, friends and neighbors come by--whizzing on skates, showing off their new treads, or bouncing a ball. Whether it's Whassup? or Yo!, Jo's got a greeting for everyone--until Grandpa arrives and only classic words will do: I love you. With a fresh new style, Caldecott Honor-winning illustrator Rachel Isadora fashions an exuberant intergenerational celebration of language, neighborhoods, and family.

With more than 30 million books sold, the My Weird School series really gets kids reading! In this seventh book in the My Weirder-est School series, A.J. and his friends learn some very weird ways to prepare for a difficult test. Test scores are low and stress levels are high at Ella Mentry School. Wellness expert Ms. Jo-Jo has come to help A.J. and his friends relax so they can ace the upcoming Fundamental Arithmetic/Reading Test. But can turtle yoga and crystal salt lamps really help A.J. and his friends relax and focus? Or will the F.A.R.T. end up blowing them all away? Perfect for reluctant readers and all kids hungry for funny school stories, Dan Gutman’s hugely popular My Weird School chapter book series has something for everyone. Don’t miss the hilarious adventures of A.J. and the gang!

This textbook introduces students progressively to various aspects of qualitative models and assumes a knowledge of basic principles of statistics and econometrics. Inferring qualitative characteristics of data on socioeconomic class, education, employment status, and the like - given their discrete nature - requires an entirely different set of tools from those applied to purely quantitative data. Written in accessible language and offering cogent examples, students are given valuable means to gauge real-world economic phenomena. After the introduction, early chapters present models with endogenous qualitative variables, examining dichotomous models, model specification, estimation methods, descriptive usage, and qualitative panel data. Professor Gourieroux also looks at Tobit models, in which the exogenous variable is sometimes qualitative and sometimes quantitative, and changing-regime models, in which the dependent variable is qualitative but expressed in quantitative terms. The final two chapters describe models which explain variables assumed by discrete or continuous positive variables.

This book offers readers a primer on the theory and applications of Ordinary Differential Equations. The style used is simple, yet thorough and rigorous. Each chapter ends with a broad set of exercises that range from the routine to the more challenging and thought-provoking. Solutions to selected exercises can be found at the end of the book. The book contains many interesting examples on topics such as electric circuits, the pendulum equation, the logistic equation, the Lotka-Volterra system, the Laplace Transform, etc., which introduce students to a number of interesting aspects of the theory and applications. The work is mainly intended for students of Mathematics, Physics, Engineering, Computer Science and other areas of the natural and social sciences that use ordinary differential equations, and who have a firm grasp of Calculus and a minimal understanding of the basic concepts used in Linear Algebra. It also studies a few more advanced topics, such as Stability Theory and Boundary Value Problems, which may be suitable for more advanced undergraduate or first-year graduate students. The second edition has been revised to correct minor errata, and features a number of carefully selected new exercises, together with more detailed explanations of some of the topics. A complete Solutions Manual, containing solutions to all the exercises published in the book, is available. Instructors who wish to adopt the book may request the manual by writing directly to one of the authors.